2FA and MFA are terms that encapsulate a few different-but-similar methods: That "second factor" could be a phone, an email address, an app, a hardware key, etc. Just requiring evidence of "something you have, something you know", etc. mitigates so much of what a simple username/password utterly fail at providing.I thought 2fa was obsolete? It’s a steady escalation but I don’t use anything resembling financial online