But you can run most of the glue on your own dedicated instances.

I run k8s on a bunch of dedicated servers that are super cheap and I have all bells and whistles - just tell your coding agent to do it. You can literally design the thing you would never do yourself and it works brilliantly.

Postgres running on dedicated hardware replicated and with wal backups - easy just tell codebuff (my harness of choice) to do it. Then any number of firewalls, load balancers, bastion servers, etc. if you can imagine it , codebuff will implement it.