[ghaff]

The geography of the Bay Area makes it harder to escape high housing prices while retaining somewhat reasonable access to pretty much the whole stretch between SF and San Jose. By contrast, go out to the suburbs and exurbs of Boston and--while some are pretty pricey--there are pretty reasonable options on commuter rail and an hour drive from the city. (And many jobs in tech and other fields aren't in the city anyway.)

Yes, housing in the core downtowns is pricey, but get outside the city and there are decent options. This is true of a lot of places. The Bay Area makes it unusually hard to escape high pricing.