Board Thread:Versus Debates/@comment-34938099-20180621162725/@comment-6769189-20180625112238

Orochimaru could create Senjutsu chakra but his body wasnt strong enough to transform.

Characters with strong enough bodies have never been shown to not transform in some way. If the senjutsu user has too little natural energy, then nothing happens. Back when Preta Pain was absorbing Naruto's chakra, he turned into Sage Mode in order to make Preta Pain absorb senjutsu.

Capable Sage Mode users also cant save or store Senjutsu chakra within themselves for later use.

Either Madara has a significantly smaller chakra pool to have to balance out, or this is an oversight/plot hole.