Our organization (big C# codebase, newer apps in scala) has doubled down on extremely functional C# (using the NICTA XShapx library which has a lot of overlap w

Our organization (big C# codebase, newer apps in scala) has doubled down on extremely functional C# (using the NICTA XShapx library which has a lot of overlap with this one). It's been a tremendous help. C#'s linq comprehension makes it one of the most powerful languages doing functional style (w\ Haskell and then scala at the top). Since LINQ supports any monad and with extension methods, you can write a lot of pure, concurrent/parallel code with minimal fuss. This has mainly been helpful from a testing perspective, since the majority of our logic is 'pure', we can run more tests without having to set up test DBs/Webservers, etc.