Board Thread:Episode Discussions/@comment-25319479-20160818105554/@comment-4646462-20160824073047

GreatestSin wrote: a bigger question is: how are kakashi and obito able to run in such a strong gravity field? My guess is that the field's designed to affect chakra along with mass. Weak people like Kakashi and Obito probably weighed around twice as much or so, but Kaguya might've weighed in the tens, if not hundreds, of tons.

As for Obito being unredeemable, well, he made it clear himself that nothing could be done, which is (partially) why he seeked death. Even then, neither Kishi nor Pierrot tried to explain these kinds of things, which leaves Obito's redemption just as half-baked as the decision to make Obito into a bad guy in the first place.