What an odd chart. Do the authors do any kind of correlation analysis on something like interest rates or median housing prices to explain the seasonality?
Most of the people I know who moved to Austin are looking to come back to the west coast due to concerns about their civil rights being removed and their overall safety. Blue city in a red state used to be a viable strategy, but several Republican governors are centered that the big centralized state government can tell the cities what to do, while simultaneously saying that the federal government can’t tell them what to do.