Board Thread:Naruto Discussions/@comment-3571355-20150819100444/@comment-6769189-20150823060553

Naruto still has SPSM, but he is not all powerful. His healing abilities apparently only go so far. The damage to Guys leg and his/Sasukes arms may have been far beyond his powers.

Madara got his Rinnegan once he was old right? Maybe his lack of field usage is what made Nagato more adept at using it than him.