> To do I/O in FP you have to deal with monads No. > The common ground is functional-ish and mostly-stateless programming ("const" etc). C# is actually becomi

> To do I/O in FP you have to deal with monads No. > The common ground is functional-ish and mostly-stateless programming ("const" etc). C# is actually becoming very good at this, and you can always cross into F# if you want. Newish C# is just functional programming dressed up as Java, and goes far beyond const. C.f. functional-ish C# programs to C programs that use const. Striking difference. F# is just .NET's version of a straight up a very traditional and canonical functional language. If F# isn't functional then nothing except maybe untyped lambda calculus is functional. The article's title is correct only in the tautological sense that unpopular things are weird, even in the paradoxical case where those unpopular things are actually fully embraced while remaining unpopular.