Actually i'm not so sure that happens by itself. Housing is governed by public policy. It's not like affordable housing couldn't be built in the bay area for ph

Actually i'm not so sure that happens by itself. Housing is governed by public policy. It's not like affordable housing couldn't be built in the bay area for physical reasons. It's just not possible under current zoning and political arrangements. If the political will were there; we could drop a pair of Hong Kong style residential apartment towers every couple of miles all the way around the bay for less than will be spent on road construction in that area over the next decade. But the political will for that sort of thing is literally inconceivable to anyone who lives there. Why is that?