Did you know that the Mission used to be an Irish neighborhood, for instance? The point is that it used to be an affordable neighborhood. And the city in gene

Did you know that the Mission used to be an Irish neighborhood, for instance? The point is that it used to be an affordable neighborhood. And the city in general used to be more or less affordable for the middle class, also -- independent of the ethnic background of its inhabitants. And that changes (including full-scale transformations of neighborhoods) which used to take generations to transpire now happen in the course of 10 years or so. Just because change has happened before doesn't mean that all "change" is equivalent (or even "natural").