The beauty of CarPlay is it is a consistent interface regardless of which car you're in. I might argue that in itself provides a bit of safety. On the rare occasion where I rent a car I am delighted when it has CarPlay as I don't have to familiarize myself with audio or navigation as it will just work. I would never bother buying a GM anyway, but this would definitely be a turn off for me. I've installed aftermarket CarPlay systems in all my BMWs that were too old to come with it and absolutely love it.