My anecdotal evidence shows a dramatic shift of my 20-something and 30-something year old co-workers to Oakland from SF due to affordability. Oakland is close,

My anecdotal evidence shows a dramatic shift of my 20-something and 30-something year old co-workers to Oakland from SF due to affordability. Oakland is close, cheaper (though rising), diverse, and close by BART. This is probably putting a good deal of supply back into the SF market, but putting pressures in the East Bay markets (Berkeley, Oakland, Alameda).