Runtime debugging in Haskell is more rare, but when you need it, it's more of a headache. Achieving performance is harder than in c or c++. The ecosystem is s

Runtime debugging in Haskell is more rare, but when you need it, it's more of a headache. Achieving performance is harder than in c or c++. The ecosystem is strong on some counts and weak in others. There's lots of API duplication (lazy/strict byte strings, map, set, seq, etc). Good performance may depend on brittle ghc optimizations that might break in very difficult to comprehend ways if ghc is upgraded.