I am also a nixos enjoyer but I have mixed feelings around the fact that I still don't really understand the configuration language.

I'm happy in the sense that its simple enough that I can install programs and do all the other usual desktop stuff with minimal knowledge. But I'm unhappy in the sense that when I started with nixos I wanted to replace docker and docker-compose. I still haven't accomplished that.

But all-in-all I'm very happy with Nixos for desktop use. No crashes, no bugs. Its the reason I was able to permanently drop Windows.