[nandemo]

Presumably the target is existing haskellers. Basically, "if you use Haskell, here's something to help you use it for shell scripts too".

I don't think it's reasonable to assert that Ada "failed" (e.g. it runs on large passenger airplanes), but in any case that's kinda beside the point, TFA isn't primarily about Haskell evangelism/advocacy.

> language pragma, do notation, liftIO, parser combinators.

Arguably, all of this is within the reach of an intermediate-level Haskell programmer. OverloadedStrings is considered a basic pragma.