Houses last for centuries, a few thousand new builds in Cali is not going to make the slightest difference. I think EV will remain a niche (<15%) until they can charge as quickly as filling a tank and until their (real) range is 700+ miles.

I'd say by 2030 buying an EV would be a viable option for most. The people buying them now are usually early adopting Tesla fan-bois who are happy to pay through the nose to be a crash test dummy for self driving.