[freeone3000]

Closer to having your existed devices work similar to a yubikey: it’s a signed challenge-response, per-site, instead of a single shared key.

[brickfaced]

That and the hypothetical ability to use different private keys per device, which could be canceled in case of loss or theft, seems legitimately useful. Not interested unless and until there's a standalone, standardized, open-source, cold-backup'ed way to use passkeys though.

[freeone3000]

Try out KeepassXC :)

[brickfaced]

Already using it for my password manager. Didn't know they'd added passkey support; thanks for the tip.