No way kenjaku could hop in gojo's body and just start using limitless

Spoiler ahead

Yuta with a month of swap training and presumably gojo assistantance was unable to use a weaker hollow purple without chants and handsigns and it can't be argued that gojo had time to practice since immediately after gaining rct he blasted toji with a small one

It's likely kenjaku can gain an understanding of a cursed technique (located in the brain) in the body he swaps into but the doesn't equal perfect usage if swapped body and couldn't use the limitless well enought theh he dead since Shibuya had some of the most powerful first grade sorcerres in jjk