Nothing we've ever seen has really changed my mind on this. I mean, we saw Old Gaban, Prime Gaban, and GV Gaban in one arc, and Old Gaban honestly looked the best.
It's been like 1200 chapters, and we know from that SBS that Oda wants to make old people look good in OP. At the very least, I don't think you lose Haki with age.
But anyway, my point is that the VC creator wasn't really trying to give a lore drop or some shit, they were just going off the manga, where Garp's Haki doesn't particularly look any worse when he's old, and everyone sees him as a threat still. It's not that deep.
This thing people do where they see how strong the old legend is and try to multiply their strength factoring in their prime simply doesn't work because Oda draws them impressive because they are old.


