Security updates to iOS 14 will let people (who might not be ready/able to switch from iOS) to actually do what GP said, without unnecessarily exposing themselves to security bugs in outdated OS.
Otherwise it sounds like a nuclear option by Apple, with dire effects.
> By using the Apple Software, you agree that Apple may download and install automatic Apple Software Updates onto your Device and your peripheral devices.
> Apple and its licensors reserve the right to change, suspend, remove, or disable access to any Services at any time without notice.
There are a couple things that are nagging me though: 1) Apple has loads of legalese for each and every feature and 2) it sounds like they could just cut all that down to two points that you cited and be golden.
I definitely see your point and I guess we can leave it at that until a lawyer can explain this...