- Edited
matchboxbananasynergy . If your second factor is not just a fingerprint but a combination of both a PIN and a fingerprint, you now have the resilience of an impossible to brute force password for when the phone is in BFU mode (7 word diceware passphrase) as well as a very secure yet easy way to unlock the phone in your everyday usage (6 digit PIN + fingerprint).
Independent of PIN+fingerprint as an option, what about having brief fingerprint-only unlocking with a timeout? So I could unlock with just a fingerprint for 90 seconds, then fingerprint & PIN until the reboot timer goes off.