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Heh, seriously though, FWIW, as someone who grew up here and was, until recently, against what I called at the time the Manhattan-ization of San Francisco, the argument that did the most to change my mind about growth was a quick review of the history of the place: In a nutshell: Ohlone, Spanish, 49ers, ..., Beatniks, Hippies, ..., Tech Bros.
In other words, locals getting displaced by incoming waves of invaders is more-or-less the history of San Francisco, from founding to the present day.
That, combined with the simple fact that I'll never realistically be able to afford to buy a home in my home town (despite having a decent career programming computers), convinced me that we should try to build ridiculous amounts of housing here. Like enough to put a serious dent in the housing shortage on a national scale, eh? Let's build hundreds of thousands of new units! I don't know how the logistics would work out, but I bet we could figure it out.