Bro I'm also trolling (kinda). But Oldbeard and fat BM are def out of their prime. Lolda already made that pretty clear
He's just afraid of making any decisive top tier clashes result in a legit victory. Theres always an if but condition. Thats why you still got powerscaling debates to this day for yonkos and admirals
I mean, they're out their prime, but they still retain their positions, so how meaningful is it anyway? Maybe it becomes a stamina issue, but the portrayal is pretty much the same.
Roger pirates want to avoid Prime BM-Kaido wants Old BM not to come to Wano
Prime WB splits the sky with Roger-Old WB splits the sky with Shanks
Using irl logic, these guys shouldn't be at the top of the world like they are in universe, but no one is going around saying BM and WB cant be Yonko, they're actually saying that about Luffy, and WB goes around disrespecting younger guys like Shanks and Akainu as brats. And sure they're immortal, but the Gorosei still aged but they pretty much rule the world.