Also, California, for all its talk about its economy, is unable to support itself.
Listen to this dude.
People are increasingly short-sighted in any event when they talk about secession from America, but California is especially precarious. Yes, at first glance it seems literally big enough (in area and population) and prosperous enough (in agriculture and tech alike) to secede and make a go of it on its own, but:
1) Much of its prosperity is tied to fellow Americans as customers of everything from farm produce to smartphones, and Americans would sanction and tariff its products post-independence, causing a TON of lost revenue,
2) Its water supply would suffer when the sources of said water, at least the Colorado, are cut off - needed diversions to keep people from dying of thirst would affect agriculture,
3) So many people would leave for America that'd disagree with independence in general much less the state's liberal policies and that includes much of the White population that is the tax base of the state,
4) That's outside the current demographic upheaval of spics versus Whites versus blacks versus Asians, all of whom barely tolerate one another and rely on the current prosperity to keep themselves from killing one another,
5) Even if granted independence, its leftist-leaning population would loathe military service and would not fund needed defense initiatives alongside America would absolutely not let foreign forces in to "protect" the state,
6) The standard of living would drop so fast for much of the lefties living off the agricultural slave labor and tech bros whining they don't have easy money or access to luxuries the revolts would be hard for the government to put down, what with no real military forces to do so,
7) Said tech bros would (some already are) moving their companies eastward to escape the tax policies and high COL of the state and would absolutely bolt for America once consequences started happening.
California would genuinely collapse in a year or two, tops, if it somehow got even a peaceful Calexit.