This article misses the forest for the trees - the question of why we have a housing deficit in the first place. And it's not because thousands of coastal cities forgot to build housing and only the author noticed. It's because they're mostly run by NIMBYs who've spent decades actively opposing new housing construction near existing jobs centers. So I don't know how the author gets from "we have a deficit" to "therefore there will be a construction boom." As long as the city governments remain controlled by NIMBY homeowners, there will be no housing boom in coastal cities.