Because it sucks. Your compiler provider goes bust, compiler is no longer updated but you want to continue to maintain and build your product. Also, learning

Because it sucks. Your compiler provider goes bust, compiler is no longer updated but you want to continue to maintain and build your product. Also, learning it as a child or student almost invariably requires pirating the compiler. Been there, done that. Building on open and free platforms is just so much better. No need to pirate, and always a way to maintain what you've built.