There once was a time when tech companies mostly stayed out of SF. People who worked in the valley but hated it lived in SF amongst mostly people who had nothing to do with the tech industry. Then someone had the bright idea to put branch offices or even whole companies in SF. Convenient for the commute (and you could move to the East or North Bay), but then SF got overrun by the tech monoculture + NIMBYs trying to “keep it the same” by preventing construction, effectively kicking out so many of the people who were the reason why valleyphobic tech workers sought out the City of Saffron in the first place.

> was a time when tech companies mostly stayed out of SF

San Francisco has been a boom town since before California was a state.