Board Thread:Theories and Speculation/@comment-1512913-20161105081557/@comment-27924662-20161219052646

well that could be because other ninjas don't know(or haven't seen ) much abt those techs. For instance only muu and Onoki are shown to have kekkei tota, Only naruto has SPSM(other than TTJ's who for some reason aren't able to use it at same proficiency). And I don't think that they would continue to give a back story for all that stuff in boruto. Perhaps they would further increase such material inorder to increase the interest(fandom) for the series