First off, academics discuss Led Zeppelin plenty and Led Zeppelin hasn't diminished at all. Further, if this "diminishment" hasn't occurred by now, it is isn't happening in another 20 years. Finally, my links are much more authoritative than your bald assertions. Indeed, Vulture is a part of New York magazine and is committed to cultural issues, like music.
Hey, the first link to Greatest Rock Bands puts LZ at #1. They have really diminished.
https://www.loudersound.com/features/the-50-best-rock-bands-of-all-time/5
Also, none of that is relevant to the original point that LZ isn't limited to one style.