BSM Naruto = Infinite Sage mode?
Jiraiya was able to keep his Sage mage activate the WHOLE time the frogs were on his shoulders, because they continuously fed him sage charka .
So why can't Kurama do the same for Naruto?
As far as I'm aware, Kurama could just lay day and gather nature energy ALL DAY if he wanted too, and it's been made very clear the he can give Naruto his charka, so why not?
Even in normal SM, Naruto could now have Kurama just feed him SM chakra the whole time and keep it going 24/7.
Perma Sage Naruto would solo anyone. Those blitzs.