We just have to normalize it. Passwords were useful until better alternatives were available, and are around now to satisfy authentication based on 'something

We just have to normalize it. Passwords were useful until better alternatives were available, and are around now to satisfy authentication based on 'something you know'. As long as the necessity is to verify something you know or something you have, a private key can be more convenient. People who prefer to enter through doors by entering a PIN instead of using a metal key will disagree. The thing left to do is make maintaining this private key as frictionless as adding a metal key to my IRL keychain. The kids may have some good ideas :)