[koder2016]

The truth is that F#'s features are not that compelling to justify the move, ML syntax is too different and R# tooling is not there and never going to be.

[smoothdeveloper]

You might be right about a small subset of people, but most developers using languages like ruby, python, basic, pascal, etc. would prove this wrong.

Also most of F# are fairly well experienced C# programmer, and I think they do find the language compelling.