This is actually about software more than hardware.
Richard Stallman's spark for founding the free software movement was being unable to modify his lab printer's source code to do what he wanted it to do.
A lot of us have been conditioned to think you "just can't" modify things like firmware, or OSes, (or increasingly in phones/tablets, user-space). But for Stallman's generation, hardware devices were 100% owned, repairable and hackable by their owners. Only software and the abuse of it could so comprehensively change a hardware device from something you obviously own, to something which in a real sense you don't control or even realistically own anymore. Apple is leading the charge in this as other companies itch to pile in.
A lot of us have been conditioned to think you "just can't" modify things like firmware, or OSes, (or increasingly in phones/tablets, user-space). But for Stallman's generation, hardware devices were 100% owned, repairable and hackable by their owners. Only software and the abuse of it could so comprehensively change a hardware device from something you obviously own, to something which in a real sense you don't control or even realistically own anymore. Apple is leading the charge in this as other companies itch to pile in.