Bluntly, California, while important, is not the motive force for EV development. There are two, China and the EU. Both are far more important than California. All EU manufacturers have very tough regulatory goals that cannot be met without substantial ZEV,.
...so GM sold Opel/Vauxhall largely because they had the worst fuel economy and EV prospects among European builders and had lost money for years;
...FiatChrysler is eagerly looking for someone, anyone, to buy in because they aren't investing enough to meet these targets on their own;
...China has adopted very aggressive emissions reduction goals, and is by far the largest BEV market in the world.
California is very important in North American context. However, the only serious US player is Tesla. GM is importing technology from Korea, from LG and their own GM Korea. Nothing real from FiarChrysler or Ford so far.
I do not mean to be argumentative but I do think it is important to understand that the US and NA are not leaders in BEV nor are the impetus for BEV technological development...except for Tesla.