Thanks for the link. I'm actually under the impression that the situation in Haskell will be changing in the near future with the project called "Backpack"[1][2], which Simon Peyton Jones and Simon Marlow are both involved with.

[1] http://plv.mpi-sws.org/backpack/ [2] https://ghc.haskell.org/trac/ghc/wiki/Backpack