I'm not sure I understand the advantage here other than avoiding a few `.m` files? The maintainers will still need to know ObjC to understand the Cocoa calls,

I'm not sure I understand the advantage here other than avoiding a few `.m` files? The maintainers will still need to know ObjC to understand the Cocoa calls, and this presumably removes a lot of the ObjC niceties in the process. And now you have an extra layer to maintain, as well as resource allocations to maintain, that ARC would take care for you. Is all the overhead worth it, over just learning to put a few square brackets around the place? The blog does mention stuff like bindings to other languages, but since ObjC is just C, that's no easier or harder really than before.