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conjecTech

1,420 karma · joined November 22, 2012

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conjecTech··on Bikes, not self driving cars, are the technological gateway to urban progress
Lowest temperature in NYC last year was 15F. Its cold, but it's not that cold. Tons of people still bike in winter. And if they don't, we have trains and busses. The nice part about orientating transit around bikes is that people tend to live reasonable distances from the places they need to go.
conjecTech··on Bikes, not self driving cars, are the technological gateway to urban progress
The word dense is in the second sentence of the wikipedia article on cities. It is inherent to discussion of urban transportation. You seem to be using the word city loosely, but it's a rather specific term.

Even though I agree the policies here apply to a small fraction of the world's area, it affects a sizable fraction of the population.

conjecTech··on Bikes, not self driving cars, are the technological gateway to urban progress
This is an article explicitly about _urban_ mobility. If you're going to exclude large, dense metropolitan areas, are you even addressing the arguments being made here?
conjecTech··on A near 100% renewables grid is well within reach, and with little storage
One thing I would love to see addressed in these kinds of analyses: the efficacy of strategic placement of solar. Electrical demand tends to peak slightly after sundown for much of the year. However, the sun obviously doesn't set at the same time everywhere. Darwin's sunset is currently an hour and a half later than Sydney/Brisbane. Could building more equatorial/western solar installations together with transmission defer some of the need for storage, even with the same amount of solar deployed?
conjecTech··on Australia grid simulation last 51 weeks: 98.8% on renewable electricity
They transitioned 3.5% of grid supply last year, and that's actually an underestimate of the transition since it doesn't factor in behind-the-meter use of solar. Solar adoption has also accelerated over the last couple of years, up from 23% growth over 2019 to 42% growth last year. I wouldn't be surprised to see an almost full transition in the next 10 years.
conjecTech··on Can the Visa-Mastercard duopoly be broken?
This is a false dichotomy. Other countries have debit systems that solve all of the problems you outline and charge 0.1%.
conjecTech··on High property taxes are good
The tax burden is similar (maybe slightly lower in NY), but collected through different means. NYC has a city income tax, Chicago doesn't.

If we're going to pick a means of collecting the same amount, encouraging good use of land and discouraging excess consumption seem like nice side effects.

conjecTech··on Solar Car Will Soon Hit Production
It’s funny how many times this same platform has been sold to the public. Elio motors, which is still publicly traded but nearing insolvency, promised to produce a gas version of effectively the same vehicle for 10k.
conjecTech··on Ask HN: Devs who passed whiteboarding at FAANG: how do you feel about it?
I'll voice an unpopular position: There are positions where you use all of these skills regularly (data structures, algorithms, system design), and they are some of the most satisfying, respected, and well-paying in tech. They are also uncommon.

For context: I've done 3-4 full job searches ranging from new grad to Staff+ that included FAANG companies, and received offers each time from some but not all of them. I've been fortunate to have other offers I preferred each time, though until recently this has meant accepting compensation below FAANG-levels.

One of the primary reasons I haven't taken a FAANG offer is because of the over-scoped nature of most of the work they offer. The positions at these companies often involve squeezing more profit out of existing successful business surfaces by fiddling with the knobs. If you're working on a surface that produces $10M in revenue each year, and you can improve it by 10% each year, you can justify a good wage. That kind of straightforward investment is exactly what middle managers like.

However, jobs like that will seldom see you architecting or changing systems at a sufficient scale where these skills become relevant. There are undoubtedly exceptions at these companies. I'm not making a universal statement. But having watched the careers of people smarter than myself both inside and outside of FAANG, I've seen a considerable gap emerge in the technical abilities and accomplishments in favor of those at leaner companies.

I think this explains the experience of most engineers going through this. To be Jeff Dean, you need all of these skills. Because of this, OG engineers like him made it part of the recruiting rubric. But you are unlikely to become Jeff Dean by joining Google now. If that is your goal, my advice is to seek out companies with the highest ratio of users to engineers. A value of 1e6/1 is a good target. These places probably look like dumpster fires because of their scaling problems. But they need these skills and have no alternative than to let you work on the problems that require them. Make sure there are a couple of people there who have done it before that you can learn from and hold on for as long as you can.

conjecTech··on Shaving is an example of how consumer products extract more money
That number seems incredibly high to me. The most I've seen blades go for in any kind of volume is around $0.20/blade. Even if you were discarding them every day, that would only account for $70/year. You can admittedly buy some rather nice shave soap, but $180/year still seems aggressive.

I admittedly don't shave every day, but I've been using a safety razor since 2013. I went back and tallied up all of the purchases for materials, including my razor, and I believe I've spent a little over $200 for that entire period, so maybe $25/year.

conjecTech··on Why is every consumer startup selling me what I already own for 10x the price?
This phenomenon becomes a lot clearer when you invert the question: Why are all the products selling for 10x the commoditized version direct-to-consumer? I think that's a lot more obvious. Or at least it is to me since I had a startup which created a premium version of something VERY commoditized(car batteries) and went through this thought process.

The first reason is retail margin. If you can manufacture something for $X, it will probably retail for $2.5-3X. When it's really cheap to make, that might be a reasonable price, but when you are making something that has 3-5x the BOM of the cheaper versions, that high of a markup can make the product inviable. When you start to look at the absolute dollar values, you realize you might be able to do your own marketing and sell direct at a lower price.

Second, with such a price premium, retail isn't as appealing because your buyers are going to be high intent. If your underwear is 5x the cost of everything around it, you're not going to sell the average Walmart shopper just because they're already there. So the other value prop of retail, exposing your product to their captive audience, isn't going to be very valuable either.

So we're left with a lot of DTC business, generally selling quite premium products at high prices, but what are often very reasonable margins. The economics can be shaky because of the high cost of user acquisition, but unfortunately there aren't really any better alternatives at present. Some people do take advantage of this general ecosystem to try to sell cheap stuff in the same manner. I think long term this is hard to due because so much of the business relies on word of mouth, but these sorts of entities definitely do come and go.

conjecTech··on Apple employees criticize work-from-home policy in open letter
Sorry if I misinferred. It seemed implied in the first and forth sentence of your comment.
conjecTech··on Apple employees criticize work-from-home policy in open letter
Insisting on a new solution being "exactly the same" to adopt it pretty much ensures you will never leave the status quo.

All changes in complex systems have tradeoffs. In-person whiteboard sessions can be exhilarating. They also tend to produce imprecise (or no) artifacts that rely heavily on the context of the meeting for interpretation.

I noticed that when our team went remote during COVID and ideation was done by async contributions to design docs, the completeness and reliability of our designs went way up. But again, it's never all positive. If there was a design that was underspecified or not fully understood by the team member leading it, the siloing could lead to analysis paralysis.

conjecTech··on Brendan at Intel.com
Upvoted your comment for a solid counter argument. Disney's growth is decelerating as well. If you measure from Q1 2021 to Q1 2022, growth was down to 37%. I do think they're a very viable competitor, but I don't think the two businesses are mutually exclusive at current ARPU.

The reliance on theatrical releases is a bit of a mixed bag. It is another mechanism for content generation that can add to their library, but it also comes at a loss of some value to users of Disney+ if they care about seeing stuff on release. Additionally, it's dependent on a distribution channel(cinemas) that is currently hemorrhaging money. If moviegoing doesn't recover to pre-pandemic levels before the apes' money runs out, it might prove to be a vulnerability.

conjecTech··on Brendan at Intel.com
Netflix's moat is the marginal unit economics of media. At present, they have twice the number of subscribers of the nearest competitor(Disney), and that ratio is probably far higher in non-US markets. They can outbid everyone for content and still deliver a service at a lower COGS than anyone else in the market. They still have to produce a high volume of good content, but it allows them far more mistakes in doing so. It also allows them to make content tailored to niches which aren't economic for others.
conjecTech··on 90% of software engineering done today is integrating poorly documented APIs
I didn't mean to diminish the value of documentation. It's hugely valuable. My point was that even if the documentation for all systems was good, the bulk of work in a mature software environment would still be integration, since that's where most of the complexity emerges.
conjecTech··on 90% of software engineering done today is integrating poorly documented APIs
I think the emphasis on the documentation is a bit of a red herring. Sure, documentation for most things could definitely be better. But when you are building a system that is a composition of subcomponents, the bulk of the complexity is almost always going to come from the interactions. Those aren't things that can be readily captured in the documentation of any single component.

This conclusion is actually pretty obvious when you consider it from a testing/dimensionality perspective. If you have 2 components with N inputs, an interesting application using both may have close to 2N inputs. Sounds pretty tame, but the size of the space grows _exponentially_ with dimension. And for a bounded space, almost all of the volume will be near the surface, which would mostly correspond to non-trivial combinations of the inputs. I think we tend to lump most of the code needed for this complexity into "business logic".

conjecTech··on Reddit blocks posting any .ru links
Top comment from an admin:

""" We decided to do this due to the heavy cyber component to this war and the chance of manipulated content. Even seemingly innocuous links could be hosted by someone that is less benign. We certainly recognize that this is a pretty far reaching decision but there are generally other ways for most people to share the type of content that is being described.

As to why this wasn't communicated, there is a lot of things going on right now and sometimes moving fast means missing steps along the way (like sharing with mods). We did not intend to hide this decision. """

So it has little to nothing to do with attempting to censor.

conjecTech··on Reddit can't build a better search engine
This thesis is off. It's not as if Reddit just appeared on the internet yesterday. It's been a place people look for this kind of info for a long time, and people have been trying to game it for just as long. And it already has a good search engine - that just happens to be Google. So it still leaves the question: why does Reddit still have such a high signal-to-noise ratio.

A few things I've noticed:

1. A lot of conversations happen before that many people are interested. Subreddits tend to attract mavens, and they often discuss things months or years before people really care (or the marketing team for whatever is being discussed is even looped in). Pay attention to when the posts you're looking at occurred. In a lot of cases, they were there earlier than you'd expect.

2. There is incredible dispersion in where conversations on a topic occur. It's not uncommon to have 10s or 100s of different communities discussing the same thing, and its not clear which is going to end up being the place people trust. Many of the sub-communities are also somewhat mutually exclusive(geography, android vs ios, etc), meaning it's going to look incredibly insincere if the same account is posting in a bunch of them.

3. Reddit posts allow negative feedback in a way few other venues due, especially not pages optimized for SEO and controlled by a single entity.

4. It is one of the few platforms with an appetite for long-form content. It is almost an anti-Twitter. Meaningfully moving a Reddit discussion on a single popular post could take hours if it could be done at all. For communities with more lasting artifacts like a wiki, it could be practically impossible.

5. As others have pointed out, the subreddits aren't controlled by and don't have the same incentives as Reddit Inc. Optimization tools aren't going to generalize well since what it takes to get to the top of each is different.

conjecTech··on If you’re so smart, why aren’t you happy?
You're creating one big false dichotomy. This notion that you either focus every bit of your being on your career or otherwise be a wage slave is absurd. Having a strong community around you is an incredible financial tailwind, beyond the fact that it is just a generally a positive thing and makes your life emotionally richer.
conjecTech··on America's Favorite Pickup Truck Goes Electric
Clean technica agrees that VW ships more. VW has more brands and models. Tesla model 3 may be the top seller, but it's one of only 2 models that Tesla has with significant volume. For instance Audi is a VW group company too. Together they have ~5 of the top 20 EVs.

[1] https://cleantechnica.com/2021/12/30/15-of-auto-sales-in-eur...

conjecTech··on “Y Combinator is not worth it”
Well, Ryan decided to block me for a rather tame quote tweet, so I guess I'll repost it here:

"YC are some of the kindest, most egalitarian people in SV. They've treated me well even after my company they invested in closed down. They give people a shot who wouldn't otherwise have one. If I were an investor who just handed this guy money at 250x revenue, I'd be nervous."

Every time I see things like this, I look back at an email Trevor Blackwell sent me about a month after we closed down our company. YC was above 100 companies/batch at that point, and he wasn't one of the partners assigned to our company. He took time out to tell us he thought we were special and hoped we would try again at some point. That vote of confidence got me through one of the darkest periods of my life. Garry, Michael, Harj and Geoff have been equally kind. Maybe YC has changed since then, but I doubt it.

conjecTech··on Americans’ Gas Stoves Are as Bad for Climate as 500k Cars
That's true with marginal costs, but it doesn't consider fixed costs. My range is the only thing that uses gas in my unit. The connection fee is $18/month. The actual charge for gas was $0.73 last month. Sure, the marginal economics look better, but I'd save close to $200/year if I could switch over to all electric.
conjecTech··on Why Galesburg has no money
Their argument is that road budgets are a consequence of the same poor designs that lead to conditions that promote crime as well. Busy streets tend to be safer. Additionally, places that aren't economically self-sustaining drive people to property crime. All of this is addressed in the first pages of "The Death and Life of Great American Cities".
conjecTech··on India defuses its population bomb: fertility falls to two children per woman
Even if lifespans don't increase the population will probably continue to expand for about 25 years since the cohorts already born are larger than they ones they are replacing. Population only plateaus once we've been at replacement rate for the same number of years as mean age of mothers at birth.
conjecTech··on Intel seems awfully scared of Graviton2. Why pay for this ad on Google?
Part of the missing picture in the datacenter market is TCO(total cost of ownership). The margin Intel used to have was driven by what it would cost you to recreate the performance they could provide by other means. If Intel had a 20% performance lead at the same power, you'd have to deploy 25% more of the closest competitor to match it. That's 25% more racks, space, electricity, heating, etc.

In the alternative, the CPU might reasonably represent 1/5 to 1/3 of total costs. How much higher could Intel price their chip while still being competitive from the TCO perspective? The answer is nearly 2x on a per unit basis using those numbers.

That calculation was relatively easy when all of the chips had very similar number of cores, and the advantage was squarely in single-core performance. It's slightly harder now, in a world where there is considerable divergence in things like number of cores and energy efficiency in addition to single core performance. But the implications of those equations have obviously swung strongly against Intel for large parts of the market. There are AMD/arm chips that are probably 2x or more the current multi-core performance of the Intel chips that were at similar prices last year. Intel has advantages around lock-in and brand, but the economic incentive of transition now can be quite staggering, and people are waking up to it.

Whether Intel will be able to make chips that would be competitive in that market, even with no margin, is yet to be seen.

conjecTech··on A key inflation measure rose to a 39-year high last month
It's still up 25% from 2019 numbers: https://polb.com/business/port-statistics/#teus-archive-1995....
conjecTech··on A key inflation measure rose to a 39-year high last month
Merchants don't usually want to lower prices proactively, but it's done all the time because they do not exist in a competitive vacuum.

From inception, container shipping has been plagued by oversupply because of the economies of bigger and bigger boats. That was still true 3 years ago. Shipping businesses were going bankrupt left and right. It is a commodity good with a relatively low cost of entry. If the existing companies don't feel like lowering prices, others will step in and happily take their market share.

conjecTech··on Crises of Elite Competition in the East and West
It's not just about the jobs. There are enormous economies of scale to living in cities. Distances travelled are shorter, stores do higher turnover(meaning fewer of them per capita), and multi-family housing is cheaper to heat & maintain to name a few. Urbanization is one of the most tested ways of making people richer.

The problem historically has been the distribution of that additional wealth. It's common to see cycles of increasing rent seeking, followed by de-urbanization/migration, and then a gradual return to cities.

conjecTech··on The Hidden Costs of Living Alone
The article stretches to portray this as a cost imposed by society, but I think the bulk of it is far more innate than that. There simply are economies of scale to household size. A lot of housing costs are proportional to surface area, and the ratio of surface area to volume drops are structures get larger. Building larger units is more economical. It extends to selling as well - it's going to take less effort to sell/rent one 2-bedroom apartment than it would for two 1-bedrooms. The cost of user acquisition for things like paper towels is lower if the average customer is buying for multiple people too.

I totally get the desire to live alone, but I never have because having roommates/cohabitation always seemed like such an obvious economic decision compared to other ways to reduce living expenses.

The Onion put out a video[1] in 2009 about an economic recovery plan that amounted to boyfriends finally agreeing to move in together with their girlfriends. I've spent a lot of time researching the housing market and macroeconomic reasons for its current distortion from historical norms. That video often pops into my mind when I do. The overall housing stock in the US has more than kept pace with the growth in population, but the reduction of household size and related growth in housing space per person has created a huge amount of incremental demand.

I don't think those are purely bad trends. My parents' generation paired off young and quickly, and the long term effects are easy enough to pick out in divorce statistics. But I do have to wonder how much of the economic woes 20-40 year olds face right now might be alleviated if the pendulum swung back a little in that direction.

[1] https://www.youtube.com/watch?v=7ADncN9HIa4

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