I know that for data storage the best bet is a NAS and RAID1 or something in that vein, but what about all the docker containers you are running, carefully configured services on your rpi, installed *arr services on your PC, etc.?
Do you have a simple way to automate backups and re-installs of these as well or are you just resigned to having to eventually reconfigure them all when the SD card fails, your OS needs a reinstall or the disk dies?
I rsync my root and everything under it to a NAS, will hopefully save my data. I wrote some scripts manually to do that.
I think the next best thing to do is to doco your setup as mich as possible. Either by typed up notes, or ansible/packer/whatever, any documentation is better than nothing if you have to rebuild.
I have a 16tb USB HDD that syncs to my NAS whenever my workstation is idle for 20 minutes.
I run history and then clean it up so i have a guide to follow on the next setup. It’s not even so much for drive failure but to move to the newer OS versions when available.
The ‘data’ is backed up by scripts that tar folders up and scp them off to another server.