> I have never seen non-trivial Haskell that didn't enable at least 1 compiler extension. Language extensions are idiomatic Haskell. There is only one mainstre

> I have never seen non-trivial Haskell that didn't enable at least 1 compiler extension. Language extensions are idiomatic Haskell. There is only one mainstream compiler used everywhere. Widely used extensions are a natural result when the compiler, as a testbed, can outpace the language standard. Enabling extensions is as trivial as including a standard library package. (In fact, the extensions are often better documented than the standard library, as you hint to.)