Could not agree more. MacRuby exists, it's great. Use it. Who cares whether or not it will replace or complement Obj-C, sliced bread or even the internal combustion engine. GC is the key to the iOS port. Not there yet, so no option at the moment. Of course the future (maybe distant, maybe near) will bring GC to iOS and MacRuby with it. No need for reinventing the wheel.