I both hate and love Cognito. Hate it for its unnecessary complexity, love it for providing auth at bargain bin prices. I review Auth0 contracts frequently and that is daylight robbery/extortion, a poster child for vendor-lock-in. I had hopes for clerk.dev, but unfortunately the auth business optimizes for deep lock-in + steadily escalating prices.

After working through a few transitions to/from Auth0 that is something I never ever want to do again at scale.