F# with it's built in actor model, robust OCaml based syntax, great support for functional Akka[.net] actors, simplified concurrency and asynch programming supp

F# with it's built in actor model, robust OCaml based syntax, great support for functional Akka[.net] actors, simplified concurrency and asynch programming support, and very own ELM implementation is a great contextual answer for anyone who wants to be on the front lines of lightweight non-blocking concurrent & parallel web development in .Net land.