It's not a legal obligation, no, but neither should you as a customer accept a vendor that treats you like that.
> vendor that treats you like that
You don't have to use Big Ai offerings, there are other options. Between deprecation and uncle sam, dependency/business risk appears to be increasing.
It's a calculation and choice that comes with consequences any way you land.
You're not going to find many people to do business with in the world if that's your bar.