And I don't want anyone to be able to "repair" or modify certain classes of hardware that I own (though I do want to be able to have root keys for the software

And I don't want anyone to be able to "repair" or modify certain classes of hardware that I own (though I do want to be able to have root keys for the software side). I don't see why hackability shouldn't be a feature that people can pay for. I can see a solid argument I could get behind for a very minimal requirement that you may request a device-specific bypass for any cryptographic restrictions. Ie., Apple entangles aspects of the hardware for security, but I'd be fine with requiring them to offer owners at time of purchase the choice to have a root hardware signing key for that device only themselves or not. But I would strongly oppose anything further than that, such as changes to the physical hardware itself. "It works for the expected lifetime" should be required, but features within that should be up to creators and customers.