It’s a dumb move. For starters, there was virtually zero chance California would have followed through with it.
And then you have the fact that if California really wanted to get rid of ICE cars, there are plenty of other things they can do that are worse than this. Astronomical gasoline taxes, registration fees, licensing requirements, etc. Requiring extraordinarily costly seismic retrofits on oil refineries. Require huge bonds on fuel stations to cover potential cleanup costs, etc.