I agree that it isn't super commonly used, but I was responding to the assertion that no one would bother making an Objective-C replacement for non-Apple platforms. Clearly some people are interested in spending time extending Apple languages for non-Apple platform purposes, so the idea that the only thing stopping people from making a "better" Objective-C is lack of support for third party platforms seems kind of strange to me. If it really were not that difficult to make a better Objective-C and enough people were interested, it seems like it would have happened regardless of official support by Apple for third party platforms. Either the interest isn't there in the first place, or it's not nearly as easy a problem as suggested.