These dumbfucks should be on their knees thanking these billionaires for locating their businesses here. Let alone declaring residency here. California at the end of the day isn't that special. I can get a Mediterranean climate in many places on the planet.
Please fucking do then, California is full.
Even more seriously though, California natives both more and less native than me (my father and I were both born here, before that the history gets Mexican, but that covered a lot of ground once) would be perfectly happy if the Hollywood and the tourism went away, and California's economy was based on real things — or at least virtually real things. People would still want to live here, because it would still have the best weather in the continental US. Parts of it are not great in that regard of course, but then that's because California has just about every kind of terrain but tundra. It's big.
As for residency, you don't not get taxed on anything simply because you're not a resident. California makes money on property taxes, it only ostensibly doesn't raise your property taxes dramatically unless you make significant improvements. If you want to own a lot of California, you're going to pay.
But once again, the billionaires can feel free to leave. California will make new ones, because it's rich land, and all wealth is derived from the land. But the reality is, they're not making more California. The last pieces of it which are pleasant to live in which haven't already been made stupendously expensive (on the North Coast) are being sold out now. Amazon is trying to come in at this moment. You're underestimating the value of a climate that's livable without air conditioning all year round. That's only getting scarcer.