Board Thread:Theories and Speculation/@comment-26479810-20191214162345/@comment-9782468-20191220172110

@Flatzone Yes but Obito also has Hashi cells and it's noted he's alive due to the strong life force of the Gedo. And also he literally had one of the strongest healers there pumping chakra into him, so the fact that he's in pain and bleeding through each one is indicative.

In any case, that still doesn't in any way discount the fact that half of Naruto's chakra +Kurama wasn't enough but Sakura's seal was.

Sasuke didn't just pop in and out of a dimension. He goes exploring throughout the dimensions. He didn't get low on chakra just by taking himself through two portals. Otherwise, after he teleported himself and the Kage, he wouldn't have any chakra left for the return trip since he took so many people, especially after him and Naruto fought together.