Let me put Mike's comment into what I think is its proper context. "Poor support for numerical computing" really means "relative to Mike's dream, which is not actually realisable by any programming language today" :-)

Most readers seem to be misinterpreting Mike as anchoring off other popular programming languages of today, whereas he's looking for language features for which there's (a) no consensus that they'll actually be good when they exist, and (b) don't yet exist. (I'm highly skeptical of dependently typed programming.)

I think that there's a case to be made that numeric programming in Haskell, relative to the state of the art of today rather than the year 2100, really isn't so great – but my concerns are very different than Mike's, and revolve around libraries rather than type system features.

Source: have done a bit of Haskell in my day.