Board Thread:Theories and Speculation/@comment-38812954-20190831032416/@comment-30323490-20190910110947

Ok, you are assuming that Sasuke had quite a large chakra left after the explosion to spam amaterasu, which he didn’t. He didn’t even have enough chakra to keep chidori up, as seen quite clearly when his chidori faded off and he was shocked. Sasuke already used amaterasu and it failed, and he didn’t have enough chakra to spam it, hence why he didn’t try it afterwards.