Passkeys are
fantastic for the vast majority of the population. They solve oodles of problems. No more teaching ${FAMILY_MEMBER} about good passwords, password re-use, trying to explain how to use a password manager, etc. Instead: create passkey, done. Then it's seamless login whether they're on their computer, phone or tablet.
As a tech-savvy user fully aware of the underlying machinations involved with passkeys, I greatly prefer their simple, fast login experience over: username submit password submit TOTP submit, and especially over the much-worse "we've emailed you a code" login slog.