The problem with Californians leaving the state and going elsewhere is that even though they leave because things aren’t working right in California, so many of them end up demanding to transfer everything that is wrong with California into their new state. Nevada is a key example. It used to be a solid Red state. No more, between transplanted California and transplanted Mexicans.
Same thing has happened to Virginia. Marylanders, quick to ruin their own state, took notice of the excellent schools, low taxes, and great quality of life in Northern Virginia compared to the cesspool of the Peoples’ Republic of Maryland. So they moved there. Soon after, they began demanding the same government services that they had before. Now, northern Virginia looks just like Maryland.