I agree that your point about building additional housing was dismissed, but I think the OP is curious as to how that plan would actually benefit the 'original'

I agree that your point about building additional housing was dismissed, but I think the OP is curious as to how that plan would actually benefit the 'original' inhabitants of that area now, after they've moved out. Having lived in SF through both tech waves now, something tells me that if the mission were to implement dense housing, the first batch of people at bay to fill it up aren't going to be the same group of immigrants I remember from the 90's. Thus, is there any hope of friendly coexistence with a dense immigrant community, or are such populations now bound to be pushed into their new densely populated housing in the tenderloin or bayview? Creating more 'ghettos' feels a bit off to propose as a solution to me (not that the city doesn't have a history of it).