Rotation: Good or Bad?

Most coaches, and even my coaches, when I was learning to swim, always talk about Freestyle rotation as a positive thing. So it’s always been, you want to rotate, you want to get on your side you want to drive the head down, you want to make sure that you really get the full arm length capacity when you’re swimming. But as I’ve been coaching over the last year or so, I’ve really been challenging this thought. Because at the end of the day, when you swim fast and you swim with a really high tempo, it’s really hard to ensure that you’re rotating enough, so it’s kind of this balance of distance per stroke, or tempo, and how do you know with your kids, essentially, which one should be swimming with a very rotated stroke, and which one should be swimming with a flatter stroke, and is a flatter stroke actually better, or does it have more benefits or is it even something we should think about compared to the fact that we’ve just always talked about a rotated Freestyle stroke.