Specifically, do you worry that Microsoft is going to eventually do the Microsoft thing and horribly fuck it up for everyone? I've really grown to appreciate the language itself, but I'm wary of it getting too ingrained at work only to have the rug pulled out from under us when it's become hard to back out.
Edit: not really "pulling the rug", but, you know, doing the Microsoft classic.
Don't worry, none of my code uses that, designated initilizers, complex numbers, variable length arrays, typedef name overloading, unintilized constants, implicit void pointer casting, implicit function declarations, nested struct defintions, or any of the other exclusively-C features.