As mentioned here, there’s an exodus from San Fran; however, it appears that it’s a more general phenomenon.
Democrats claim their policies are superior to Republicans, but they keep leaving their blue states and moving into red states. Democrats are known for taking over large urban areas and turning them blue, then deserting them as they become unpleasant to move on to better territory in red states where they make the same transformations. They increase taxes and regulations, making it expensive and annoying to live wherever they get into power.