If I’m being completely honest, it sounds like you hit a problem and then just kinda gave up (I’m not trying to sound mean or anything - please don’t take it that way).
If I were in that situation I would probably drop to a terminal (ex. CTRL+ALT+3) and try to find what failed (journalctl). Especially if the screen just stayed black I would probably wonder what packages I just updated. I’m not going to remember, but it’s probably something graphical. Maybe I installed nvidia dkms packages and I have a mismatch or I decided to try out a different login manager and it happens to not support Wayland or something. Snapshots would be my last resort, not my first.
As far as NixOS, I love it. Its incredibly stable and the declarative language is really handy to write in. I’m not aware of any graphical store though (outside of maybe some github project). Its declarative meaning you write the configuration.nix file and import any secondary files into the config. And packages are installed declaratively:
environment.systemPackages = with pkgs; [
pkgs.gnome-tweaks
pkgs.gnome-control-center
pkgs.gnome-terminal
}
I would say if you are wanting GUI that NixOS is probably not a great choice. I mean just to get installed package version, you’re going to have to do a one-liner (mine for example):
#!/bin/bash
find /run/current-system/sw/bin/ -type l -exec readlink {} \; | sed -E 's|[^-]+-([^/]+)/.*|\1|g' | sort -ui



I’ve been looking for a new book server and discovered Booklore/Grimmory as well. Here is the history I can find on it as some of what people are saying is not 100% correct.
It was not vibe-coded. The original project predates genAI, so that wouldn’t have been since. I think some of the newer code might be, but the core seems unchanged.
The security issue mentioned is an API authentication bypass whereby book files were exposed if the endpoint was reachable (CVE-2025-62614). This has an 8.7 rating on severity, but realistically the end result is your books could be copied.
Licensing. This is the real skullduggery in my opinion. The maintainer had plans to switch from AGPL-3.0 to BSL. That might not be legal and it cuts out any contributors and sets the project up for monetization.
My concern with Grimmory is that it is too embedded with the flaws of Booklore. In testing it was really sluggish on mobile. I still need to do more testing, but aside from being graphically nice, it didn’t feel that stable. I was hoping to move away from Calibre-Web due to auto-importing not being supported, but in the end, I’ll likely just write something to support this on my end.