In this regard I think CA is kind of like NY.
People and companies in general don’t migrate domestically anymore into CA or NY.
They start here (emigrate here).
And that’s what makes those states actually worth living in — foreigners are often more interesting than uptight, white-bread Americans. One reason why I love NYC is that 40% of its residents were NOT born here.
This being said, as far as domestic human (not corporate) migration, CA is fairly balanced right now. And I personally know quite a few people who have moved Northeast to CA in the past 5 years.