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I am sorry, haskell is just a huge roadblock to get things done in the real world.

Languages tend to suffer from an Iron Triangle: quick to write, quick execution, quick to learn-- pick 2. Haskell takes a long time to learn but it produces very high-quality executables and, once you know it, it's very productive.

While "quick execution" may seem separate from the type safety which is also a major selling point of Haskell-- and, arguably, a bigger one-- they're actually tightly coupled. Safe code can be optimized more aggressively, and it's often for the sake of performance that unsafe things are done... so the fact that Haskell can be robust and generate fast executables is a major win.

Haskell just says "Fcuk you ! its my way or the gonadway !"

It doesn't, but I am going to start saying this. Thank you for the inspiration.

Apparently mutation is a crime

Not so. Every program's main method has type signature IO (), which means that it does perform mutation. You just want to get as many functions as possible not to involve mutation because it's easier to reason about them. It's a similar principle to dependency injection, but more robust and clear.

However the implementation of haskell is not really ready for production or useful enough for the average developer.

I disagree. With Clojure and Scala, I've met people who've used them and moved away. Satisfaction rates seem to be about 60% with Scala (that is, 60% of teams or companies that make a major move to Scala are happy) and 90% with Clojure. I've never heard of anyone who's become unhappy with Haskell or rolled back on it.

One of the dangers of using Scala, for an example, is that, if that if your Scala deployment doesn't work out (or is sound but is blamed by the business for something unrelated) you can get stuck doing Java. Haskell, at least, doesn't have that problem.

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