US census data shows the region that includes San Francisco, Oakland, and Hayward — a city in the East Bay that offers a quicker commute to Silicon Valley — lost more residents than it attracted between 2016 and 2017. People are leaving San Francisco because of the out-of-control housing prices. The city's median-priced home now costs $1.5 million. The nation's tech capital risks losing talent if they can't afford to live there.