Board Thread:Naruto Discussions/@comment-30168130-20170706050832/@comment-734582-20170707180233

Lorenzo.r.1st wrote: but vs madara he didn't use it, vs kinshiki (1st time) he could've, but didn't. like, why? Madara could absorb chakra, so it's likely he didn't want to risk it. He was busy enough figuring out his own and Madara's powers.

Against Momoshiki he did use the Majestic susanoo. but again, villagers were closeby. Neither he nor Naruto could really go all-out without utterly annihilating the village and everyone in it. This is even made explicit in the manga.

PS is a superweapon. It's thus best used as such. Sasuke's Amenotejikara and sword are simply a more manageable combo where he doesn't have to worry if he's gonna destroy a village by accident.