But it's conceivable that SF basically becomes the Mahattan of the Bay Area, a playground for the rich, while everyone else gets pushed into the outlying boroughs and beyond
It certainly was true and happened when I lived there in the 90's. All the "artists" and young (not dotcom) people pushed out to Oakland. Gentrification of The Mission (inner then outer), of 16th St, of Hayes Valley, Condofication/Dotcom offication of SOMA, etc.
It will happen again. Pushing out the middle class yuppies who pushed out the poorish people before them, who pushed out the immigrants before them, who pushed out...
Isn't this already basically true?