I was wondering why Madara only learned Fire.
Its not an obligation for Uchiha only to use Fire since Sasuke has learned Lightning and Fire so why can't Madara learn another element ?
He certainly lived long enough to learn it and there is not doubt that if he had he would have mastered it pretty quickly. It would also stop Fire's elemental weakness from being exploited (Mei) so he could choose Earth.
From what I have seen a lot of Jounin have two elements or more which is pretty strange and is proof that Madara could have learnt another element if he wanted to.
Kakashi: 3 elements, technically is still a Jounin.
Darui: 2 elements, not sure but I think he too is a Jounin.
Yamato: 2 elements, another Jounin
Asuma: 2 elements, another Jounin
So whats stopping Madara from learning another element ?