The last arc was kind of hilarious in that the level of power-ups that Naruto and Sasuke kept getting were so increasingly drastic and ludicrious.
Naruto almost kills himself taking out Kakuzu with the combination of his entire team helping. Soon after that, he beats all 6 bodies of Pain simultaneously despite the fact that Pain beat THE ENTIRE VILLAGE simultaneously because of a training he spent like 10 days on.
At that point it just ramps absurdly over and over. He gets the Fox power forcibly (in like a couple of weeks) which is enough for him to beat up the LEGENDARY RAIKAGE who is buffed with Infinite Chakra, by himself. He also beats several other kage buffed with the same power-up. Then he beats up Madara Uchiha, who buffed himself with the ultimate power, then beats up the progenitor of the ninja race (granted he gets help from Sasuke there), but at the end of the series, Naruto and Sasuke are almost literally Gods to the point that nobody could ever plausibly defeat them in combat, either in the current ninja world or even throughout the entire history of humanity, because he proved it.
Like, at least in Dragon Ball, you could speculate there's literal deities that could beat Goku in a fight.
