I hope you are right. GM's track record from the very beginning has been terrible. But I will be happy if you are right because we need as many EVs on the road as the car makers are willing to build.
My dislike of GM goes way back. I was born in L.A. and when I was very young L.A. had a marvelous system of trollycars: Electrified public transportation. GM was part of the consortium that bought that system, dismantled it, and replaced it with (GM-built) fossil-fuel busses that ran so seldom that nobody who could manage to buy a car would use them. My last few years in L.A. I spent many cumulative hours waiting at bus stops for connections to busses that ran once an hour. In order to sell cars, GM forced poor Angelinos (those who couldn't afford a car) into transportation hell. And did it by tearing out a wonderful public transportation system. Just to force people to buy cars which turned the air into carcinogenic filth.
My mother (RIP) was single and poor so I was almost born on a bus in SoCal as my mother had no way to get to the hospital that she could afford. You might not know this, but different bus routes run on different schedule, and can be adapted to an expanding suburban region, and up to 8 buses can run the same route. There are some that are 15 minutes apart I used growing up to go to college.
Rails in California are not for the poor.