> One drawback might be that political will and attention is fleeting; and interests become vested in a current state, blocking change; and it's now or not for another generation or so.

If a problem, like tracking what non SOTA models are doing with respect to safety, don't rise to being worth regulated, then why bother regulating it? If you're going to force everyone in the field, in California, to file additional paperwork (and understand what they're legally supposed to report and how and when), then you probably should have a compelling argument for why. If you didn't do that now, and it's never a big enough problem to regulate then you've done no real harm. If it's clearly an issue that needs to be regulated in the future then it should be easy to do so.