Can you be confident that any future hardware, or linux even, will remain open to tinker with? If you're worried about tech being closed up, that's fine and well. I wholeheartedly agree with you. But future hardware being limited isn't the same as forcing an update on existing owners, locking services to new devices, etc.
We’re talking about hardware here. There’s no guarantee that all future hardware will be able to boot an unsigned Linux kernel that the user compiled themselves.
Tell that to people who were caught by surprise when redhat decided CentOS was no longer viable. Sure you could find alternatives, but it was still a deeply undesirable disruption.
