It's trivially easy. Just think of all the debates we've had over gentrification in Nob Hill or Pac Heights. Oh wait. We haven't had any. Because these are th

It's trivially easy. Just think of all the debates we've had over gentrification in Nob Hill or Pac Heights. Oh wait. We haven't had any. Because these are the enclaves of people with so much wealth that even the techies can't afford to move in.