Yeah let's get to that million first before splitting everyone. It's really not helpful in the current state.
And there are actually options besides "this is how it currently works so it's good". Like some kind of federated communities/magazines where when you post to one it's posted to all of them. And I'm not saying it would be technically easy to implement, I have no idea, but I'm saying there are always room for improvement.
Near-identical communities/magazines with the same exact goal isn't practical.