Building more housing is good policy, but let's not kid ourselves -- there would be tons of gentrification in any remotely plausible amount of development in in

Building more housing is good policy, but let's not kid ourselves -- there would be tons of gentrification in any remotely plausible amount of development in in-demand places to live like San Francisco or Mountain View. In-fill development might slow gentrification a bit, but it certainly won't make San Francisco or Mountain View affordable to people who make $50k per year, much less those who make $25k per year.