Worstgen
Cinera
Nothing can be done about it though, Oda is just shit at physics. In verse the Sky Island feat is portrayed as very impressive despite it not being that impressive compared to other occurrences in OP.
Finalbeta
Welp at least for Kaido that fall isn't impressive hehehe
Fukki
Yeah, I know. Oda probably doesn't even know how to calc kinetic energy nor what terminal velocity is, he probably just assume higher fall = greater impact. I took interest in that feat because it is supposed to be super impressive when it's pale in comparison to some of the feats other characters did.
Zoro would not survive the fall from Sky Island given the story's portrayal of Kaido's feat, but resisting Issho's gravity is IIRC calced at a city level (or thereabouts feat). That is so many orders of magnitude above the Sky Island fall it isn't even funny.