[raywu]

Isn’t this what passkey is trying to sidestep? Assuming the user is at least authenticated on one device.

[cuu508]

For people who are bad with computers, I think passkeys could work ok in scenario where somebody has just one device, they never upgrade it, never lose it, never break it, never accidentally click on "log out" in their passkey provider's account.

[skybrian]

In other words, having just one device is as bad as having just one key to a safe. You need redundancy to avoid getting locked out.