Most residents of San Francisco -- homeless, tech, lower-income, whatever -- want absolutely nothing to change except for what makes them happier. And in most cases, the loudest, wealthiest, Pac Heights/Sea Cliff voices want the "charm" of San Francisco to stay the same. Meanwhile, it's one of the most undesirable places to merely walk around that I've come across in my life, and I only work in the city because I have to. I will never move to the city.
Some of the comments are already popping up on TechCrunch; "do you want SF to be the next NYC?" My answer to that is abso-fucking-lutely. New York City is perfectly suited to dense living without gritting your teeth; the subways run 24/7, the risk of stepping in homeless shit is significantly lower, there are very few places in NYC that make me cringe as much as the TL after sundown, the varying cultures get along and complement each other instead of beating Google Bus piñatas at a dirty-ass BART station...
If San Francisco slowly became the next New York City I'd be pleased as a peach. (Imagine NYC with SF's weather!) But it will never happen in our lifetimes. Honestly, I think it's a California thing, because L.A. has a better shot at it and that's not going to happen either.