What is the case against F#? [closed]

Answer 1

1. Ask a programming question on SO and specify you are using F#.
2. Ask the same question and specify you are using C#.
3. Compare the answers.

Using a novel programming language is a calculated risk--you may get more built-in functionality and syntactic sugar, but you will lose in community support, ability to hire programmers, and working around blind spots in the language.

I'm not picking on F#--every decision of programming language is a risk equation you need to work out. If people didn't take that risk on C#, we'd all still be using VB6 and C++ now. Same with those languages versus their predecessors. You have to decide for your project whether the advantages outweigh the risks.