The real operational complexity
Good overview of tasks wrt selfhosting (or rather dedicated server in a non silo datacenter), weekly, monthly, quarterly. Amounts to half a day per quarter at most. You do need to time risky updates etc better, if you run stuff others depend upon, so that you can do incident response
I helped prove this to myself when I migrated off RDS. I took a pg_dump of my RDS instance, restored it to a self-hosted server with identical specs, and ran my application's test suite. Performance was identical. In some cases, it was actually better because I could tune parameters that RDS locks down.
This reads like what I did wrt Gmail 2014 and Amazon ebooks 2025. [[Leaving a walled garden or silo 20160820203833]] is listing the bits it does and originally improved for you, then rebuild outside the silo based on same components. Not difficult but needs bit of focus.