Their potential playlist is so big and diverse, they don’t need Whole Lotta Love, or even Stairway. They could just play all of Physical Graffitti, and I’d be a happy boy.
As for how Led Zeppelin endures over time, both of my sons have most of their songs on their iPods, and listen to them often. And I don’t think it’s just to humor the old geezer.
I was a monster Zep fan from the beginning (like most teen boys my age when they hit the scene) but I’ve heard every lick of every song soooo many times I’ve just gotten bored with it. It doesn’t help that most “Classic Rock” radio stations act as if Zepplin only recorded six songs in their entire career and they play those same six songs constantly, 24/7. Sometimes I wish we could bury every known Zep recording in time capsule for 10 years and maybe when we dig it up it will sound fresh again. And Zep certainly isn’t the only cherished band of my youth I’ve grown to feel that way about. I guess eventually you can get burnt out on anything.