It sounds like your configuration is not sufficiently backed up.
It is backed up. 1x per auto-backup (Borg, included in the AIO) and 2x on different external drives.
The setup isn’t complicated too, basically barebones Debian with docker.
It’s just that setting everything up (once) again is annoying and highly inconvenient.
But, thank you for your tips on the LUKS-stuff, I will consider it! 🙂
I was at the same spot as you a few months ago and searched for the same.
Pretty much all of the FOSS readers sucked UX wise.
There were a few great proprietary ones on the PlayStore, but they were crammed up with ads and trackers.
Lastly I switched to Librera, which was the best FOSS reader I tried.
But even that wasn’t great.
So, I’ll give you a completely different advice than all the other commenters here: buy yourself an e-reader.
I did the same and couldn’t be more happy!
I’m a big fan of “do one thing and do it right” (I made my phone pretty dumb and also own a digital camera for example).
Readers feel superb. They have a very comfortable display (almost like reading on real paper), don’t distract you and the battery lasts for weeks.
You can also sync them easily via USB.
Just don’t buy a Kindle. Aim for a more open solution, like a Tolino or Kobo.