If Naruto loses the ability he used on Kakashi and Guy after Kaguya's seal, what did Sasuke lose?
I'm up with an assumption. It's not really clear if Naruto lost his six paths ability, but if so, Sasuke also has some limitations on the usage of his rinnegan. His rinnegan has tomoes, and some state that it's a representation of it's charge. It doesn't seem to lose it's charge until he wields a no tomoe rinnegan in boruto series. So, his rinnegan must have lost it's ability to maintain it's charge.