This was an executive order, not a law that was passed. Given that multiple new governors will likely have taken office in California between now and 2035, and

This was an executive order, not a law that was passed. Given that multiple new governors will likely have taken office in California between now and 2035, and any one of them can rescind or modify this based on the then-state of the electric car market and the economy, it doesn't really mean anything. If the electric car market is mature enough by 2035 for this to not cause major economic issues for car dealers and others throughout the state, then it will stand. But if that's the case, the majority of car sales will be electric with or without this order. If that's not the case, it will be quietly rescinded or modified by the then-governor. So this order, effectively, is just political posturing and changes nothing that won't naturally happen (or not happen) anyway.