If they break it, the people who really need this feature will simply not upgrade. Companies run decades old software all the time, this isn't going to be any different. It's just like nvidia's ridiculous blocking of cryptocurrency mining workloads. Once the fix is out, it's over.
Also I have no doubt people will find other ways to unlock the hardware.
stuff like video games often require driver updates to function, which is a major use case of this hack. Not to mention older nvidia drivers do not support newer linux kernels.
Also I have no doubt people will find other ways to unlock the hardware.