Still not decided to move. We are evaluating Supertokens now, but we were already considering to move out of Auth0, but originally to Cognito, then I stumbled upon you guys and decided to take a look. I was really impressed with the easy of use after testing out Blitz.js over the weekend.
Mainly what I consider the biggest issue is that Auth0 adds too much complexity on things we need simple, plus, it's expensive. For an early stage startup I don't think we should be spending too much cash and time on auth, but this is the reality. And finally, the complexity of customizing the login/registration screens are simply TOO annoying.
We have been using both email password + social login. Also OTP would be one thing to look for the future (not exactly now).