I’m a 1Password user. There are times I want to login with one of my personal accounts on my work laptop, auxiliary device I have, or family member’s device. On all these occasions, I’m not going to install 1Password and sync down my entire vault, just to delete it 5 minutes later. I simply reveal the password in my app and type it in. With passkeys there is no way to do this. It’s an edge case, but an important one.
I’d feel much better about passkeys if it wasn’t some mysterious thing locked away in a vault. If it’s effectively a public/private key pair, I should be able to see the private in my password manager and copy/paste it wherever I want, and however I want. If I could do this I would instantly understand what’s going on and be more accepting of it, though I’d expect I’d still run into some edge cases.