[thomk]

Hardware keys embedded under your skin. What could possibly go wrong with that?

Joking aside, hardware keys will absolutely get lost. Even car keys get lost around here on a fairly regular basis.

Fingerprints maybe?

[kardos]

Probably not: https://www.csoonline.com/article/3268837/busted-cops-use-fi...

[stevenicr]

and when the fingerprint database is stolen and shared with multiple adversarial parties? they now have your password and its gonna be hard to update / change yours.

This happened with the opm hack and a big one in India or Indonesia or something not too long ago I think.