I like the idea. And since I am breaking my system on a regular basis I love the possibility to go back or not break it in the first place. However I noticed some issues.

Iscsi isn’t working since the program can’t change specific files. Vlc settings can’t be changed and sth is wrong with the default ones.

Nixos makes things write only that shouldn’t be or there’s missing an option to make a new version by changing the file.