To go with your analogy, I think the point would be that it's silly to argue one of (Python/Ruby) is objectively superior to the other. Yet with version-control

To go with your analogy, I think the point would be that it's silly to argue one of (Python/Ruby) is objectively superior to the other. Yet with version-control that's precisely the argument we hear so often; yes, the workflows are different, and the particular techniques for specific use cases are different, but there aren't -- so far as I know -- many, if any, use cases where one or the other just falls over and says "that's impossible".