Anyone used Phoenix + Supabase?

It occurs to me that if you use Supabase for your database layer, then you not only get an auth system, but you also get multi-tenancy. So this effectively makes your app simpler and more flexible.

Supabase costs $25 month, and that’s about what you have to pay just to get off the ground with a decent Postgres hosted solution for a Phoenix app anyway.

How is Supabase not just a hands-down winner here? If your app needs a Postgres database and your app needs to authenticate/authorize users, then shouldn’t Supabase be the go-to choice? What possible benefits are there to just going with a Postgres installation that doesn’t bundle an auth system?