The problem is that California is already having a problem with the lack of TAX they are collecting on EVs.
They have sold so many EVs in CA that the amount of road tax is coming up way short of what they counted on.
So, now they are talking about adding a mileage tax in the state based on how much you drive. Which takes away the incentive of buying an EV. Even though EVs do more damage to the highway than a similar sized ICE automobile. This is because the extra 1000 pounds in the weight of an EV. They higher the percentage of EVs, the more damage to the highway system.
CA imports one-third of its electricity.