They still are productive, Cocoa and Objective C are better then C in a lot of things. (All.. [] ]'> )

But they fix you. Besides Cocoa, there is nothing that let's you use it, and you just can't go and port the complete object model (even the API is an obejct model) to another language. GNUStep may come close, if you want ugly apps that noone is going to use anyways.

Look at .NET, and you get Mono, wich works better then that, altough I guess Microsoft tries to fix you on MS platforms with that, too.