Smart locks typically have more option than just a phone to open them. Keypad, fingerprint, etc.
For ones that support Apple's Homekey, it doesn't even matter if your battery runs out. Apple devices still provide Homekey via NFC even with a dead phone.
I don't think this exists yet for car keys, although I know there's work on UltraWide Band key support.
Also, this seems substanially less fragile than just... losing a pair of keys. It's not evitable that your battery in your lock runs out (again, unless you ignore warnings), but losing your keys is one of those 'hard to prepare for' events.
Migitation for losing your keys could just be keeping a spare key with a neighbor/friend/whatever... but, well, you can do that with an e-lock too (cause they all have regular keys for true backup).
For ones that support Apple's Homekey, it doesn't even matter if your battery runs out. Apple devices still provide Homekey via NFC even with a dead phone.
I don't think this exists yet for car keys, although I know there's work on UltraWide Band key support.
Also, this seems substanially less fragile than just... losing a pair of keys. It's not evitable that your battery in your lock runs out (again, unless you ignore warnings), but losing your keys is one of those 'hard to prepare for' events.
Migitation for losing your keys could just be keeping a spare key with a neighbor/friend/whatever... but, well, you can do that with an e-lock too (cause they all have regular keys for true backup).