I will tryna Cheer u Up, Souma didnt Die, the author said that People who doesnt want to die will not die easily and it was like a metaphor where No matter How many times he stabbed the Sakura Tree it Still didnt die, so it was same as him.
True. He will LIVE ON. Like the Sakura tree as "he" told him to live too
There's not a single person who's normal in this story.