Also man, I know some people were skeptical about the music I think beforehand since the guy hadn't worked on much, but mannnnn. It's some good shit so far. The reuse of certain themes and expanding upon them bit by bit is really doing it for me good.
I've not read ONE's version, but I assume that version taps into it more considering how much farther along it is than Murata's version. I don't exactly see it as a literal buddha thing. I still think Saitama has some breadth of emotion and it not being completely a farce as well. Emotions to him kind of don't mean anything though when he's a godlike being though. He stated as much in his bathtub in episode 1 as far as I remember. I do agree that he is physically super strong and also emotionally strong to an extent. I think he can also be in a state of depression while still being emotionally strong though. His life is lived for heroism, but he also wishes to seek the thrill of early heroism again. With him reaching a plateau with nothing coming close to him power-wise means he feels empty inside. I do think he'll stand by his beliefs of being a hero no matter what. Even if people ridicule him or don't realize who he is he'll keep pursuing heroism because it's the closest thing to making him feel more alive and like a person again. Genos first tagged along with Saitama because of his overwhelming power, but as times goes he realizes Saitama has even more to offer as a teacher. I think Saitama could be stable without Genos if he had to be, but life is more enjoyable when you have a friend there to share your pain or triumph or simply understand who you are.
I might be rambling and going off base a lot too when trying to put this into words, but eh dunno.
Also this kind of talk might be why Deep Sea King stuff is my favorite arc in Murata's version so far.