Earlier quoted context omitted.
Suburban and housing costs in California are very high by national standards. Is your argument that the people who are moving out of California overwhelmingly non-native Californians?
Once you are out of the main coastal communities housing prices drop dramatically. I have friends in Eureka renting a gigantic house for like $1200/mo, and I saw studio apartments in the city center in the order of $750/mo. The SoCal equivalents would be $3500/mo-plus and $1500/mo-plus, respectively.
What does Eureka have (appart for nice nature)? How much does one has to drive to go to an airport that can fly directly to Europe or Asia? If your local business closed, how long and how much would you have to drive to find another job?
Commanding a mid-level metro prices, without the economy vibrancy of one, is sheer overpricing. And maybe that's why so many locals are leaving. (the influx is usually immigrants, which are more willing to put up with crappier conditions).