Slow code review is really bad for productivity. Both cost of task switching as you wait, and of merging upstream changes into your branch.

That's a reasonable observation, but only loosely related to the parent post. Admin, code reviews, meetings all count towards that 2-4 hour goal

Being productive is getting things out the door to production.

Writing code is only a part of this equation. If you don't have a process that cares well about the other required things (reviews, testing, meeting and thinking, etc), you end up with a lot of code written, and much less of it useful for business at a given moment.

"The Phoenix Project" references this - when a particular resource (expert) is the only person who can get some task done. Of course that means that person is at or beyond 100% utilization, which means their queue length (or wait time) goes through the roof. Paradoxically, reducing utilization increases productivity/throughput. The section about controlling WIP here [1] illustrates it quite well.

[1] https://itrevolution.com/resource-guide-for-the-phoenix-proj...

From what I understand there are a few studies that point towards people only really accomplishing a few hours of work a day no matter how many hours they’re “at work”.

the right wing would never settle for it

I think 8 hours of preset structured time is too much for some professions. 2-4 hours of preset/structured time per day is very reasonable with the rest of the time open for flexible creative work as needed, at least in a field that works on intellectual products.

I work in a research environment and it's not like creativity just turns on and off with a switch because it's 8am on Monday and someone said I need to be working right now. It also doesn't turn off at 430PM because that's when work ends. You can require me to be there and have me iterate on existing ideas, but you won't see any profound output, just small iterative improvements. My greatest ideas happen in my leisure or during casual yet in-depth conversations. Heck, some of my best output happens when some idea hits me on a slow weekend morning or late in the evening and I delve deep into it.

For physical labor, 8 hours a day is pretty doable, I'd say 6-7 is reasonable. I've done both types of work and don't have much problem with 8 hours that don't require me to think very deeply. Typical office work fits in here and involves doing simple broad tasks, often mixing in some random light physical activities and usually has little work baggage that you carry home with you (unlike creative work).

If the work is very physically taxing, I feel it has the same effect as very mentally taxing work in that you can sustain it for much less time (say, physically moving heavy objects which requires manual downtime). I recently moved myself and no matter how motivated I was to move those boxes, my body needs a physical recovery break.

You're too used to 8 hours - its been the standard for as long as you've been alive, but there is no good or scientific reason for it.

The work day used to be 12 (or in some cases more) hours, and a lot of people fought and literally died to get it down to 8. And the expectation wasn't that it would stay there - instead, the common idea was that as productivity due to technological advances etc. would keep pushing it down to only a few hours per day.

Instead, productivity has soared and the parasitic capitalists of the world and their legion of class traitor middle managers have managed to convince people that 8 hours is somehow perfect even though rarely anybody even actually works 8 hours these days - how long is your commute? Do you get work related alerts on your phone? Coworkers/bosses messaging you? That's all time wasted thinking about work. This small group of people - probably what, no more than 5000 out of 7bn people? Are hoarding and stealing obscene amounts of ill gotten gains, killing the planet in the process and ruining probably billions of lives, while we sit here and argue about whether or not we "deserve" to work less or whatever.

> I can not see how it would work if the majority of people did this.

What would fail to work, in your opinion?

A couple of observations:

First, actually productive work is probably on the order of that anyhow, most of the "8 hours at work" tends to be wasted away.

Second, a lot of our material possessions can now be provided with automation.

So there's probably not that much if any economic loss if people worked less. However, let's assume for a second that working 4 hours instead of 8 would, in fact, reduce GDP by half. In 2017, the US real GDP was $18 trillion. If we halve that, we go back to 1989. We were actually pretty well off in 1989[1].

And yes, macro-economically I also don't understand why recessions are so horrible. Let's assume they throw us back a year. So what? Things were generally pretty OK last year, and at any rate not much different from this year.

AFAICT, the reason recessions are so horrible is that they hit very asymmetrically, so some people are a lot worse off. So it comes back to distribution.

[1] https://www.thebalance.com/us-gdp-by-year-3305543

Literally every job I've had in the last 10 years I've self-structured into 4 hours of deep work, 4 hours of everything else(meetings, randomization, etc).

Started by getting into the office much earlier(7-8am) when normal office hours started around 10-11. It's worked very well for me and I've had no problem completing significant work at a good pace.

Uhm... What?

I'd be happy working (making profit for someone else, and getting a tiny portion of it) 0 hours a day.

I've projects, ideas, experiments, and entertainment I would much rather be doing than 40h/week . I want live and do, not toil for some indifferent capitalist.

Well, you don't spend the rest of your time drooling, you know. You volunteer, get politically active, take care of others, cook and garden, get exercise and sunshine, chat with friends and family, do creative projects, clean, do small repairs, read, write, learn things. I stayed home with my kids for 10 years and was never bored.