@chethusk: “Why shouldn’t you use it, I’d say 
Since I discovered it ~5 years ago it’s become my go-to language for build, test, web, microservices, and now even client-side JS via @ FableCompiler . It’s expressive yet pragmatic and fixes many footguns that object-oriented programming has.”
See more reasons at @swlaschin’s Why use F#? | F# for fun and profit