.NET is great. It's fast, clean, and the 
    framework libs are incredibly good.

Having worked with .NET, I beg to differ -- .NET framework libs are a mess.

    C#, IronPython, and F# are amazing.

It's not the languages that keep people away from .NET -- to put it simply -- community, tools, price.

Microsoft does a good job at playing catch-up, but unfortunately (for them) when it comes to web development, innovation happens somewhere else.

And sure, Visual Studio compensates for a lot, but it's just an IDE, the least important part of the stack.