@publicvoit I asked on Overleaf (who don't have a fb login option) what wouldhappen if say twitter went down and people used that to login. So asked what the contingency plan is.
I think the current situation is a wake up callfor people and the idea of single sign on is prone to problems.
I know debian salsa can be used for different services, again same problem may be lying in wait.
@zleap SSO is great for services of the same provider, not different ones.
I do like TOTP and FIDO2 for strong auth and I don't have an issue with those passwords.