 massively up zone New York and San Francisco, how many people would want to move there? Or would we still see some out migration for other reasons, for other policy reasons as well, right? It's not all housing, it's other things, taxes and so forth. Second, again, small empirical quibble because we are nowhere near the limit, whatever it is, but how high can we really build? You know, I love Brian talks about these giant skyscrapers on Central Park.