I would, of course, agree that the majority of C# developers are on Windows (this seems natural). However, I think mono is in wider use than people think becaus

I would, of course, agree that the majority of C# developers are on Windows (this seems natural). However, I think mono is in wider use than people think because of the fact that it's embedded in products like Unity. It's often not very obvious. WPF was a definite non-starter for mono. Just too huge of an undertaking; much more focus on GTK#. Sometimes it's easier to bring something else to Windows than to bring Windows to everything else. In the case of WPF, it seems like not bothering was probably the correct move... My understanding is that F# works just fine on linux and mac, but I haven't had the opportunity yet. Quite interested in this as well.