" But people who choose closed source projects tend to do so for their own set of reasons (mostly support and the fact that they don't have the time and/or skil

" But people who choose closed source projects tend to do so for their own set of reasons (mostly support and the fact that they don't have the time and/or skill to look through a languages source code to figure out a bug themselves)" A bit of background: I'm a bit of an odd duck. I'm a vim using rubyist on ubuntu (with awesome wm) OSS during the day and at night I program in C# on a mac using mono and monodevelop. To me, C# is a much better designed Java (the good parts.) I've found the Mono project to be very reliable as well, and they are doing really cool stuff like aot compilation and running on ARM. Anyway... To me, F# is interesting because I already program in C# in the same way that clojure is interesting to java developers.