Objective-C was a very interesting language, in some ways much better than C++ while filling the same type of role. It's a shame that so much effort is being thrown away by Apple. I recommend anybody who has an Objective-C program that they don't wish to rewrite in Swift to look into GNUstep. I personally have two Objective-C projects which I will not be porting to Swift, instead I will port them from Cocoa to GNUstep.