The IRA was able to extend the subsidies for Tesla because it had the considerable resources of the Fedetal government behind it. A state is going to have fewer resources, and so it makes sense to go back to the original and less-generous regime. More practically, Tesla has already received a lot of subsidies and now has large sales and economies of scale, so it’s not very practical for California to allocate limited resources to Tesla rather than companies that haven’t yet reached scalable production.

Of course the very best thing here would be for the Federal government to maintain the subsidies of the IRA, and then California wouldn’t have to step in with its more limited capabilities in the first place. If that’s important to Tesla, I’m sure they have someone who can talk to the incoming administration about it.