A Facebook executive on Thursday called the Bay Area's housing affordability crisis an "existential issue" that's forcing the company to grapple with its future in the region, even as it plans new campuses for tens of thousands of additional employees in San Francisco and Silicon Valley.
"Our position is that Silicon Valley has been this extraordinary engine of economic opportunity and if we can't solve the housing and transportation issues, Silicon Valley won't be Silicon Valley," Elliot Schrage…
