> Hiding the ways in which your code isn't really Haskell (e.g. isn't going to be compatible with other random Haskell code) ... Haskell code with any extensio

> Hiding the ways in which your code isn't really Haskell (e.g. isn't going to be compatible with other random Haskell code) ... Haskell code with any extensions enabled is pretty much always compatible with Haskell code with any other extensions enabled. (I only said "pretty much" to hedge my bets. I literally can't think of any case where extensions could make your code incompatible with other code across a module boundary.)