But he and Luffy's body are different. And it's even more so to say he'll die is because Luffy will obviously begin to gear-stack again. And the more he'll do that, the worse he's gonna get. So possibly after the war when he goes all out his body won't take it anymore his internal organs will be ****ed up. And that's why I think Law may die after the first emperor ark because if he were to be alive when Luffy's organs are ****ed, he can replace them ETC. So there's much more to this but this is just a brief outline.