I make little use of .NET; my hand-coded atomic queue is faster than .NET work stealing for parallelism, for example. I like the slightly cleaner syntax and twice as fast for my applications.

I'm escaping the black hole of Haskell. If one can code in Chez Scheme, one can code without parametrized modules, as much as I admire them. And there are also F# additions OCaml could admire.

I held back for all of your reasons, and finally caved. I never saw myself in the .NET ecosystem, but prejudices are a funny thing.