The article mentions this, but that’s strongly enough in my opinion. With fly you have no managed PostgreSQL. In my opinion, it’s not really comparable on cost to aws when Postgres is in the stack.

You do read about interesting hacks where someone will set up rds in a region that may be single digit milliseconds away from a fly region. then, presumably, you could put PG bouncer on a sort of bastion host that connects to the fly wire guard VPN. But obviously, there’s no guarantee that the latency will always be that good.

Does Fly allow to run unmanaged Postres easily enough? Or even semi-managed, as easy-to-provision nodes without redundancy where you yourself set up pgbouncer, replication, etc? For simpler cases it could very well suffice.

https://github.com/fly-apps/postgres-ha

It has some direct `flyctl` integration (which is also open source), but it's not doing anything you can't do yourself if you want.