The worry is, as time goes on, it will become harder and harder to "bolt on" Linux (or OSX) support.
Being cross-platform is a design decision, and it effects how you go about developing your platform (what technologies you use, etc...). So the fear is, they'll go down the Microsoft path and find it difficult to bring in other platforms down the road.
Being cross-platform is a design decision, and it effects how you go about developing your platform (what technologies you use, etc...). So the fear is, they'll go down the Microsoft path and find it difficult to bring in other platforms down the road.