As I said “how to reproduce this in a home setup”.

I’m running multiple machines, paid little for all of them, and they all run at pretty low power. I replicate stuff on a schedule, I and have a cloud backup I verify quarterly.

If OP is thinking about how to ensure uptime (however they define it) and prevent downtime due to upgrades, then looking at how Enterprise does things (the people who use research into this very subject performed by universities and organizations like Microsoft and Google), would be useful.

Nowhere did I tell OP to do things this way, and I’d thank you to not make strawmen of my words.