Nim is one of my favorite languages, and has been one of my primary languages in rotation for projects for the last five or so years. I've written servers (and web frontends, CLI tools, quick scripts, etc.) with it and am very happy with the results.

It's hard for me to put into words why I like it so much, but I think it might actually be because it's such a mishmash of paradigms. If I'm in a functional mood, I can use lots of ideas from functional programming. If I feel like using OOP everywhere, I can do that too. And if I want to mix both together, it's no problem! Nim kind of feels like the Wild West, and while that's something I'd dislike in most languages, for whatever reason it works when writing in Nim.