Re: Why isn't Obito able to stay in his dimension in more than 5minutes?
Originally Posted by Bogard
My bet is that staying intangible is dangerous in the long run.
Think about it, intangibility means simply Obito warping just PARTS of his body to the other dimension, while the rest stays in the real one. How can he still be alive with his body defragmented? Obviously, he can, and for some reason, the body is not hurt or anything after he warps the part of it back to the real dimension.
But it still is something unnatural, so I think it's kind of like holding your breath. You don't need to breathe all the time, but if you stop doing it for too long, you're screwed. To my mind, the same applies to Obito's intangiblity.
Manga has not provided as with the answer as of yet, though.
And no, this restriction doesn't apply to everyone, only Obito (look how long Sasuke, Karin and Danzo's ANBU were kept in there and were fine). In fact, it doesn't really apply to Obito as well - it simply applies to everyone using intangibility.