The capabilities of Shelf are going to be the limiting factor to enterprise use far before Supabase/Postgres will be.

I assure you that you're not going to reach the level of enterprise we're talking about there (where some sort of sharding strategy becomes important).

Basically - if you would run it on RDS, you can run it on Supabase

Supabase uses PostgreSQL and they support offboarding from Supabase so you probably could make this enterprise ready.

On the pricing page, the paid plans are “production ready.” I wonder how they define an enterprise.