"Passkeys" is a new brand name slapped on an older open, interoperable technology, so it's difficult for me to be "against passkeys" as they haven't fundamentally changed anything.

Before the branding they were known as FIDO2 "discoverable credentials" or "resident keys".

Two things have changed with the rebrand:

1. A lot of platforms are adopting support for FIDO2 resident keys. This is good actually.

2. A lot of large companies have set themselves up as providers of FIDO2 resident keys without export or migration mechanisms. This is the vendor lock-in part (no export feature), but it's not a feature of the underlying tech itself.

Fwiw FIDO are actively working on some standard for exporting/importing keys so that's something.

If you want to use passkeys without lockin, just use Bitwarden or KeepPassXC - they all have full support. Or you can also store a limited number of passkeys on your FIDO2-compatible hardware key like Yubikey or the open-source Nitrokeys.

For someone who hasn't spent any time thinking about that matter, could you please elaborate your point?

Do you recommend a password manager to everyone you know? What's the adoption rate?