I can't speak to economic feasibility, but with the Toyota RAV4 being one of the most popular cars in the US and already being available as a PHEV, it doesn't seem that far-fetched to have these kinds of vehicles becoming a large portion of those sold.
In fact this type of virtue signaling only hurts the people on the fringes because now the ICE car market and dealers will just cite this ban to markup their cars even more on top of the supply chain excuse.
This is a "let them eat cake" moment on already widened wealth gap. The people at the top sure do care more about these things than their fellow Americans who are barely above the poverty line.
This isn't banning the sale of ICE cars on the secondary market.
Just more wokeness to destroy California.