There is one thing that no state in the US mainland can match California -— THE WEATHER.
As long as the California weather stays the way it is, people will continue to STAY until it becomes Northern Mexico ( and even then, many will continue to stay ).
Good weather will eventually destroy any place that doesn’t have a brutal, totalitarian government to keep the streets clean. You wouldn’t see all those homeless mutants in California if temperatures regularly dropped below 0 there for long stretches of the winter.