Well, they were right. The song does remain the same. No doubt that when they wrote it, they had in mind some grand metaphor for the endless turning of the world. But, really, in the most prosaic terms, the song literally remains the same in the sense that everyone who grew up listening to Led Zeppelin is till sitting around listening to Led Zeppelin. For example, me. I am still choosing to listen to Led Zeppelin over the possibility of exploring whatever the hell is being done right now, today, by people who weren’t born when Winston Churchill was still alive. Which officially makes me an old person, I think.