[p0llard]

> Why would you guess?

Because I'm basing it on my experience doing research in PLT, but this is of course purely anecdotal and my areas of research interest lie away from the likes of Haskell, so I would not wish to make a false claim by stating it as fact.

> Why is this [more] important?

I never said that it was, only that depending on what is meant by "leading", industry usage might not be relevant. Since Scala is by far the more used language I think it's fair to assume that (without meaning to put words into mouths) the original commenter might have been talking about PLT research as opposed to usage in industry.