Why would you use it over, say Python, for example? I'm really surprised something from Microsoft works well on Linux. (Not saying they aren't technically capable, just lack motivation to get it work well).
C# is the easiest language and I already know it. Facebook was written in PHP, not because it was the best choice, but because Mark already knew it. If I was doing ML stuff I think I'd have to learn python. To be honest I wish I was some emacs genius doing everything on linux, but ¯\_(ツ)_/¯