But I’ve had the same Linux box for over 15 years now (through various hardware changes, I’ve kept the same Ubuntu install since circa 2008, using do-release-upgrade for major updates and making sure to keep up with security updates) and I’m not sure it’s really worth it to optimize for easy recovery from a fresh install. I back up my homedir and etc and some other important data, and if I had to rebuild my OS I’m sure I’d do it far cleaner this time and wouldn’t want to fully do things the way I had them anyway.
Even as a hobby it just doesn’t seem worth it to move away from the “pets, not cattle” model of servers when there’s just one or two of them (technically my router is separate but it’s a very simple router so there’s not much to do there)