Imo the worst part of nix is how it turns into this chicken or the egg scenario. Let me explain, nix is very good at reproducing things. It ensures that all things are the same when installing a piece of software. Once someone writes a nix module, generally speaking, it "just works". You can always take that nix file and get it to run the same way on another machine. But since most gamers/musicians don't give two shits about reproducible software, it doesn't get packaged. And with no packages they will never be interested to get into nix.

As I write this though I realize, many open source projects have struggled with getting contributions from the community. Personally, I just think nix solves the issue of "idk, it works on my machine" better than anything I've seen. Being able to reproduce software and stop dependency issues is a very valuble thing, just not for everyone.