I use nix in production, and I love it. It's just as good in practice as it is in theory. I think the problem is that really using nix involves learning a new

I use nix in production, and I love it. It's just as good in practice as it is in theory. I think the problem is that really using nix involves learning a new language. And it's a weird lazy functional language at that. So yeah, the Haskell folk adopt it readily enough, but everyone else has a high barrier to get over. The only people that do it are the ones that have really wrestled with the problem of dependencies and can see how well nix solves it.