I dearly miss "username and password".
A #passkey feels like magic to users. They just "click" and then they're logged in. No idea where the passkey has gone, it's somewhere, it "just works". Great, right?
Passwords on the other hand are tangible, and annoyingly so. Every time you want to log in, you're asked for the #password you've chosen. It's not abstract either - it's just some characters. There's no room for misunderstanding where a password comes from and where it's stored - that's your job! (Well, at least that was the case before browsers shipped built-in password managers. But you'll get the point.)
This tangibility is not only a burden but a blessing, too. For a lack of a better word, I'd call this "storage location awareness". That might be your head. Or a password manager controlled by you. The important bit is: You know where it is, you'll need to access it often, and consequently there's a low chance that you won't know how to access it, e.g. after switching devices.