Earlier quoted context omitted.
I guess the argument against your move would be potential future earnings. If you top out at your current salary, you made the right choice. But if you continue on an upward trajectory, what do you think the top money (as an employee) could possibly be in Austin? Now compare that to the Bay. I'd guess it's not even close, no?
Would the potential future earnings be sufficient to purchase a home in SF? That's comparable to what he or she could get in Austin?
We have shit transportation infrastructure & the housing market is (for us) insane.