Here is another data point. I tried F# for a GUI application some time ago. F# OOP is confusing, with a lot of syntactic variations and limitations on what kind

Here is another data point. I tried F# for a GUI application some time ago. F# OOP is confusing, with a lot of syntactic variations and limitations on what kind of expressions you can put where. Subtyping doesn't work well because you have to upcast everywhere. I started again in C# and it was much better. Not only is the OOP better but also the IDE. F# is okay for data processing like you describe, but Ruby is better.