Not your OP and not answering your question directly, but the aforementioned "tech-to-housing cost" ratio isn't so straightforward for finding out where to work. For the record, your parent seems to have thrown out Houston anecdotally. AFAIK it doesn't have a tech scene much different than would be expected from a metro area of ~6M people but it's super cheap to live in as cities go.

The 'cheap' big cities (sticking to the US, those in the middle of the country: Chicago et Houston in particular) have just enough tech to show up on the hypothetical chart and are cheap enough to place well. But IMO, even as a U of Illinois alum and massive fan of Chicago, the tech density isn't such that you would be able to find particularly interesting work, especially compared to the Bay. That said, surely there enough startups that need app/web developers to pay your rent in those relatively inexpensive areas if that's your thing.

The cities that interest me are those with a high density of tech at a lower cost: Austin, Portland, Raleigh, etc. The Bay housing cost is trickling down there too; there are so many people making _so much_ in the Bay that still can't afford to stay that when they start moving to these places they can really affect the smaller markets. Austin has had a crazy housing boom in the last ~15 years, but it would take a _lot_ more people moving to Chicago to move the needle there.

You still face issues with inequality squashing culture, like in Austin, which has a strong history of art and music and is so much cheaper than the Bay but so much more expensive than the areas around it. Bigger cities can generally support the diversity of people needed to maintain a viable culture if they aren't 7x7 miles and surrounded by water on three sides like San Francisco is. In other words, you could move out of the Bay to one of these places and live happily for a few years before you find these same problems following you to your new home.

This is a bit of an exploration but I think about leaving the Bay daily as my wife and I get more serious about starting a family. We talk about this often, and to each family, it's the most important thing in their lives. SV is really in for a wake-up call as it sheds talent that can't afford to stay.