If by "plague" you are referring to the Corona virus
No, he means the actual Plague, the Black Death...you know, the one the Monty Python "Bring Out Your Dead!" skit was based on. The sanitation problems from the enormous numbers of homeless has caused the rat population to skyrocket and rats are the vector for the Plague. California has actually at least partially succeeded in regressing back to the medieval Middle Ages. Serfs living in ramshackle tents and improvised shelters while the rich & powerful live in luxury off of the backs of the common man while seeking ever more power and control while the Black Plague and fuck knows what else metastasizes and spreads in the decaying filth of the cities.
The covid-19 virus panic and overreaction is just icing on this cake of massive corruption and virulent, toxic partisan Leftism that's been slowly baking for many decades. Shit, just add some metallic-appearing clothing, some weird hairdo's, and some sci-fi visual/lighting effects, and L.A./San Fran are damned film sets for a Dystopian sci-fi movie. At this point I don't see how California could possibly remain viable as a place for large scale auto manufacturing.
It would not surprise me in the least if Musk follows through on relocating. He'd be a fool not to in my opinion, before the corrupt politicians have time to come up with some way to try to force Tesla to stay somehow.
Strat