The Economist:

Migration into the state has remained steady for a decade (it is the number leaving that has changed). California continues to attract the same share of foreign immigrants as ever, roughly a quarter, even though the total fell. And, remarkably, demographic decline has gone hand in hand with higher educational and living standards. In the 2010s, according to the Public Policy Institute of California, a research group, more college graduates moved to the state than left, at a time when people with only high-school education were flooding out. Incomers tended to be wealthier, too. Perhaps you have to be rich and educated to move to California.

Mr Newsom may be right. California is still where the future happens first: a future of ageing, declining populations, ethnic diversity and educational advance.