You can substitute "Bay Area" with many of the major centers in the US at this point - Seattle, LA, Denver, Austin all have the same issues, they're just a few years behind the Bay. We need fixes to zoning and development rules and tax laws, they help cities be more liveable as it will help everyone. Cities overseas have figured this out, to some degree - rent as a % of income is lower in both Europe and Asia, generally, and it's a lot easier to build effective mass transit when housing densities are a bit higher. The single family home is one of the worst things to happen to the US, and it's slowly killing us with traffic and spiraling housing prices.