Which they still own and have.
Adding an optional "You phone us and we can unlock your car with a copy of your key" is fine by me. As long as I still have the fucking key.
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For the second part - The security boogey man is not a compelling argument to give up ownership rights and enter digital serfdom where you only own a device if you use it in the way the manufacturer intends and approves of.
I'm not asking them to stop selling devices with locks. Hell, I'm even fine with them keeping a copy of the keys (which they have right now). I'm just saying: As the owner of a computer, I deserve to have a copy of the fucking keys that make it work.
Zero of which will be bought by me.
>Apple adds these arbitrary digital locks since they protect against the threat model of physical access
Apple can add as many arbitrary digital locks as they want. The problem is that they keep the key instead of giving it to the user.
Apple adds these arbitrary digital locks since they protect against the threat model of physical access, whether that be an attack thanks to leaving the phone unlocked or giving your passcode to your friend to use for a while. This is all in disregardless of whether or not the customer actually has this as part of their personal threat model.