[Malcolmlisk]

The internet is built the wrong way, using emails and passwords, users and recovery links. Here is the solution, an app that uses your email and uses a password to create a user name but has no recovery link. That's the advantage.

[ilovefood]

Vault doesn't use emails, usernames or anything like that. It's just shared as an example of a signer. It doesn't have to be that app per se, but it's the closest example I know of.