Comment by _8j50

It is inferior to multi-factor authentication. It sounds fancy but you are removing a layer of security for no reason other than it's trendy and hyped up! Good security is application of layers of defenses in a disciplined and consistent way. I should not be able to steal a yubikey or find one flaw in your passwordless credential reset method or abuse the next and greatest phishing method like in-browser vnc with webusb and that's all I need to take over an account. Let me clarify: the problem is removal of "what you know" as a layer of defense and a factor of authentication. I don't care if it is a password, passphrase, pin, puzzle, picture or whatever, without it having only one factor of authentication is remarkably inferior to MFA. And this is detrimental to 10-15+ years of security culture improvements all because vendors and clueless c-suite execs prefer to follow trends instead of listening to actual security professionals.