Anecdotally this is happening. Lumber at Home Depot is scarce. I know people leaving Bay Area, Philly, and Richmond. In the case of Richmond, the protests contributed. I get the sense that many of the families leaving were planning to leave eventually in the next few years anyway. In America, it is very common for couples to start in cities, and then move out before child 1 goes to school. This situation is accelerating that process.