If you bought something under the pretense that you could disable cloud stuff and then it silently starts uploading to the cloud, that's a violation of your agreement.
If they start dropping all requests until you assent to their shrinkwrap agreement, that still feels like a violation of the promises they made when you bought it, but unfortunately has precedent. See also: all the video games that no longer work because the publishers stopped supporting the servers they relied on.
The agreement contains provisions by which they can unilaterally change the agreement. They almost all do now, it's pretty standard boilerplate. Not long ago there was a TV, I wanna say it was LG but doublecheck that before you quote me, that shipped an OTA update with a change to the licensing agreement. Either you agreed, or they intentionally disabled all functionality. As we steadily move toward that sort of freedom that means less things you can actually do and more ways you can get screwed over this kind of stuff becomes increasingly common.
"Legal" requires judges that will view the case in a certain way and often needs the force of a government agency to back it. This administration has gutted both those things. Expect it to get worse, not better.
If you bought something under the pretense that you could disable cloud stuff and then it silently starts uploading to the cloud, that's a violation of your agreement.
If they start dropping all requests until you assent to their shrinkwrap agreement, that still feels like a violation of the promises they made when you bought it, but unfortunately has precedent. See also: all the video games that no longer work because the publishers stopped supporting the servers they relied on.