I think there's a big chicken-and-egg problem here since why would websites use it before there are users? But it also seems like it would be too much of a has

I think there's a big chicken-and-egg problem here since why would websites use it before there are users? But it also seems like it would be too much of a hassle for users. If they let their browser or Lastpass save the passwords, they can log in automatically without multiple steps involving a phone. I mind having to take out my phone for regular 2-factor authentication but I normally only need to do that once for each device. I also find that I would rather type in a couple digits than wait for a camera and QR code recognition.