The difference between zero and one factor is infinite. The difference between one and two factors is huge. The difference between two and three is almost negli

The difference between zero and one factor is infinite. The difference between one and two factors is huge. The difference between two and three is almost negligible. Except in Citrix-like situations where you're sharing the actual reader hardware, passkeys are only useful for a device you have physical access to, and that's already one factor. So in that sense they can replace passwords, I guess, but they seem like a strictly worse solution.