Comment by jimktrains2
Comment by jimktrains2 18 hours ago
And then how do I loan it to a friend without the rigamarole of adding them as an authenticated user?
What if I'm not able to add them as an authenticated user or authentic myself to let them drive, e.g. I'm injured or very drunk?
I imagine the same way you share a key for a HomeKit-enabled smart lock.
The only scenarios where one is so injured and/or drunk as to not be able to complete the non-rigamarolish process of sharing a HomeKit home key either by doing it themselves or walking someone through the process are ones where the key holder is so incapacitated that they would be unable to share a physical key.
All of that is someone irrelevant because Express Mode is enabled by default, so if you are unconscious all a person has to do is pull your phone out of your pocket and use it to unlock and start your car the exact same way physical keys work in that situation. It even works if the phone's battery is dead.
https://support.apple.com/en-us/118271
Also, every implementation of CarKit Car Keys I have seen is the same as HomeKit home keys: there is a backup. Either a physical key, PIN, fob, or card.