Quote Originally Posted by Rater202 View Post
Um, one: If that were the case he'd be dead, and two: in Naruto Gaiden, where we first see Sarada's issues with Sasuke, Naruto uses Kurama Mode(jmaybe Kurama sage mode) when fighting Shin. He kind of needs Kurama for that.

Remember, there are two Kuramas now because of Minato ripping him in half before he sealed him.
Right I forgot he had the other half inside of him. Still it does make a degree of sense that he's weaker due to age, right?