It’s a combination of issues. First is compatibility issues. Like logging in on mobile web or app with a passkey doesn’t reliably work for me. It might have been due to the password manager, but for some things the option wasn’t even there afaict. If I’m going to really switch to passkeys, I want it to work more reliably.

The second is usability. Passwords in a password manager are a 2 click entry on the username or password form field. Password managers have streamlined this system over the past decade.

Passkeys, ironically, required more steps when pulling from the password manager, including required clicks in less convenient places. I hope these types of issues get ironed out eventually.