There was some comment here somewhere arguing that 16 characters for a password is too little, but that he used the pattern lock. Looks like it was deleted.

Anyway. The pattern lock in Android provides Log2(389112) =~ 18.57 bits of entropy. This is less than 3 random characters, or 4 lowercase letters, or a decimal PIN digit password of 6 characters.

Granted, you could use mnemonics for long passwords, but how convenient is to input those long passwords?

I wonder why don't they just allow for longer passwords and just use a hash digest when it's too long, rather than just disallowing people from using strong passwords that they will remember. This pushes people to reuse passwords, send them to themselves, and other bad practices.

Maybe because it was mistaken. I just set my grapheneos to a 35 character password to test it and it didnt seem to have any issue.