You can grow by 15% even if you have 20 or 25 users :-P .
I am a huge Haskell fan though. The 'problem' with Haskell is that, because of its roots in academic research the language will not chase success at any price (read hacks); and tends to eventually find solutions to its problems even if it means not being popular for a long time. I like that. Watch out for stuff like linear types[1] coming to GHC soon.
> The 'problem' with Haskell is that, because of its roots in academic research the language will not chase success at any price (read hacks); and tends to eventually find solutions to its problems even if it means not being popular for a long time.
That's the PR line, but only describes about 5% of the problem with haskell.
But haskell's not relatively unpopular because it was late to add things like linear types. It's relatively unpopular because it doesn't care much about user experience.
Consider: it's getting linear types before an efficient string type in `base`. The first goal of this language is not good engineering practices and getting things right. The first goal of this language is "cool type stuff", with good engineering maybe goal 10 or something (is O(n^2) `nub` ever going to be deprecated I wonder?). And that's fine, we need a language for cool type stuff, let's just be honest about it.
Context: I've been Haskelling for 5 years, I've written a fair amount of FOSS in it, and it's my favorite language. I just want to help spread an honest impression of it.