As a general principle, when a city finds something it's really good at, something it's the best in the world at, and there's room to grow this thing? It is en

As a general principle, when a city finds something it's really good at, something it's the best in the world at, and there's room to grow this thing? It is entirely natural for the city to balloon in size. It is ridiculous to expect the rest of the world to direct money into the city, without the city employing more people in this industry (and thus more people in general), and thus needing to house more people overall. That is what economic growth is, and an area of labor migration (where someone in an economic backwater can move to a thriving new boomtown) is a large part of what a functioning economy is. SF desperately needs coders; But as it adds coders, it also needs to add yoga instructors, bank tellers, retail sales clerks, and dentists to serve the coders, or to serve each other while sponging off the excess money flowing into the pocket of the coders.