[hiljusti]

Well sure, there's Stackage, and there's Nix, and there's some other options.

Haskell, for my money, is similar to Node.js in that I don't have confidence I could reliably expect the state of Haskell development _today_ to resemble Haskell development 5~10 years from now. There's a cost to falling behind (who wants to work on a Haskell project using 10-year-old conventions?) and there's also a cost to keeping up.

Don't get me wrong, I think it's getting better. Stack is easy enough to learn, Stackage has nice for guarantees on compatibility. Nix solves some issues for deployments, although "multiple solid integrations" is maybe a too-rosy description from my experience... but I don't think that Haskell's ecosystem is in its final form yet. Not in the way that Maven or Cargo feel like they're stupid simple and here to stay.