Isn't this just lawyer speak for "we update our model a lot, and we've never signed off on saying we're going to support every previous release we've ever published, and may turn them off at any time, don't complain about it when we do."

We're talking about downloadable weights here, so they can't turn them off, or force you (through technical means) to use a newer version.

It's a local model, they can't turn it off. It's files on your computer without network access.

but what if they send a lawyer to ask firmly? (kindly, but firmly.)

They'd need to send a lot of lawyers, considering that they have no idea how many people are using the model, and very little way of finding out. And they'd need a TOS violation. It would be generally expensive for them to do at scale; this isn't about "turning it off" arbitrarily, it's a CYA in case someone specific does something really bad that makes Google look bad: Google can patch the model to make it not comply with the bad request, and then demand the person running the model update or else lose their license to use the product. It's a scalpel, not an off switch.