Board Thread:Theories and Speculation/@comment-34656247-20180408204136/@comment-33286580-20180412074645

novels are not cannon.

the manga has more or less established that Itachi use of Tsukuyomi makes it feel like about three days go by (at best - the time he used it on Kakashi the first time around) in a second or so.

on that note, we also saw a Tsukuyomi, though not Itachi's level, used by Sasuke on KillerB adn it did nothing. Sasuke may not have the prowess with Tsukuyomi has Itachi, being capable of making it seem like three days pass by in a second or so, but his Tsukuyomi is still that very jutsu. it is one of the most powerful genjutsu and it was shown to be useless.

so, in point Tsukuyomi is useless. it was shown in the manga.