I'm not sure what the situation is on Haskell. In Scala there are at least 3 such libraries. I feel your objection is making the great the enemy of the good. T

I'm not sure what the situation is on Haskell. In Scala there are at least 3 such libraries. I feel your objection is making the great the enemy of the good. These libraries are vastly better than the default way of working in imperative languages (I know from experience with both!) and we should try to make the innovations more widely known rather than nitpicking.