Still don't get why baka gaijin find this amusing. It's fairly normal not only in Japan but also China and Korea. Folding steel a thousand times is something you actually say in Japanese and Chinese.
I have a diamond saw. it's pretty cool since it has industrial diamonds inside the blade
..well, you know in this case, something did change after he did it over and over again. Mainly, he became a master swordsman that broke the rules of the world by making a skill that's a noble phantasm in itself. Like, it's insane to even think about doing it, but he did it and he's insane, but he did change something. Mainly, his sword skills.