Nix was my next plan lol. My last distro suddenly had some file system corruption problems mid week when I needed it, so I had to switch to something quick without much time for configuration. So I decided to go for a preconfigured distro.
My next plan is Nix when I have some time.
As for how I back stuff up for frequent distro hopping: Firefox login syncs my browser stuff and passwords, steam syncs my game save files, I backup my home folder to a USB once in a while so I don't lose any local documents. I have private GitHub repos for some window manager, bar, etc configs I've made like sway, i3, polybar, awesomewm, etc., that I use when switching to more barebones distros.