[ghaff]

Remember that when much of Silicon Valley was established, the sorts of people who worked at those companies mostly had no interest in living in SF. Same with the Boston area. (There was a period when Boston metro had basically no tech at all and SF is similar.)

San Jose is also not really a city in the way SF is. I used to go to conferences there fairly regularly. (Intel's IDF was there for a number of years before decamping to the Moscone.) Was there for another event a few years back and I was sort of surprised how relatively run down a lot of the downtown still was. Some new restaurants and the like but not really what I expected in SV.