Before F# came into VS 2010, we already had C#, VB, C++/CLI (nee Managed C++), IronPython, IronRuby, and all the third parties targeting the CLR.

It is really not having a clue what purpose they want for F#, I bet they have repented to ship it on VS2010.

First it was for libraries only, then during the VS Express days it was for Web development, now they are trying to pivot it into data analysis and ML, while DevDiv manages to bring Guido out of retirement and finally manages to pursuade CPython core team about improving its performance.