That’s always the idle threat, but the reality is that they likely don’t want to invest in the machines anyway.
I think a more likely phenomenon is that some (likely smaller) chains will be like “fuck it” and close up shop in CA.
Or the most likely scenario is that they just pad the prices a little more in CA and keep the chains open.
Long term I think people will just adjust to it and it’ll be normal. Chains that are looking to maintain their “value” positioning will just absorb it out of their profit margins like they do in other localities.