I think they're already using their own fork of an older Mono version. They couldn't work out a mutually beneficial licensing deal with Xamarin to keep using th

I think they're already using their own fork of an older Mono version. They couldn't work out a mutually beneficial licensing deal with Xamarin to keep using their newest Mono versions or something. I think Unity have a good relationship with MS, so Mono being moved to MS should be good news to Unity -- for a while.