So what's going to be the next great cutting feat for a Swordsman, or does it stop at Kaido?
And Law's devil fruit ability bypasses durability, so he's not the best candidate to use in this situation
Laws devil fruit is not confirmed to "bypass durability". That's fan speculation. Until Law cleaves Kaido in half, we won't know whether Law could just end this arc whenever he wants to.
I brought up law because you said we haven't seen seastone get cut. We have. And the wano artisans plus the navy who shape seastone to make their ships all can do this.
And I'm glad you brought this back to Zoro.
Zoro doesn't need a "great cutting feat" for anything really. I wish you could read what I type next very carefully.
The point of Zoro cutting steel was that he FALSELY assumed the measure of his strength was the strength of substance he could cut. I use the word "falsely" for two reasons.
The lesson he learns from Koshiro is to cut NOTHING. That's the primary thing to this teaching. Zoro asks Koshiro about Cutting steel and Koshiro's answer is the opposite. He fails to cut paper in front of zoro and that's the point. But Zoro doesn't get it. Even when he grows to be an adult, he doesn't get it.
The lesson is "a sword that cuts everything is not a sword". This is what Koshiro teaches him. He was supposed to cut ONLY what he wanted to cut. And to learn that he had to learn to cut nothing.
That's the first reason why Zoro FALSELY assumed the bigger the cut, the netter the swordsman.
Secondly, Zoro REFUSES to cut diamond. People for some reason not only forget that Zoro said he doesn't want to do this, they also forget WHY HE DOESN'T. The lesson he learned was that just being able to cut harder things doesn't make you a better swordsman.
His exact words to Daz are "That would be a waste". Because diamond is precious as it is. Cutting it proves that exactly NOTHING anymore. Because just "cutting a harder thing" no longer means "better swordsman" to Zoro.
Those are the two very glaring reasons why it's very obvious that Zoro DOES NOT NEED A "great cutting feat".
In fact he stops looking for harder things to cut immediately after this. If your reasoning that "great cutting feat" is somehow mandatory for Zoro then it's like saying he's been lacking since Alabasta in substantial progression as a swordsman.
Which isn't true. Zoro progresses as a swordsman ONLY by winning sword fights. That's it. It doesn't matter what big slash he makes, if he doesn't ein a fight, he hasn't progressed.
The story has never focused on Zoro wanting to cut a bigger thing or harder thing since Alabasta because Zoro learned a lesson. He stopped caring about that.
That's why the only thing that has caught his interest since Alabasta is cutting fire. Because of course that's entirely a skill based ability akin to him learning to NOT cut paper.
That's why his most substantial improvement post time skip is training with Enma.
Notice something about Enma. It embodies the exact opposite of what Zoro learned in Alabasta. The sword forces Zoro to cut WHAT HE DOESN'T WANT TO CUT. It forces his to cut a cliff when he's trying to cut a tree. And so he's back to square one. He's back to previous Alabasta Zoro. But he already learned the lesson of ONLY CUT WHAT YOU WANT so this time the challenge comes when his sword itself is forcing him to return to his old ways of big harder cutting means better swordsmsn. And now Zoro has to re-learn the lesson.
Yet in the end, the one and only "great cutting feat" Set up for Zoro since punk hazard is just cutting fire. An entirely skill based ability. Because that's all he needs. He stopped caring about bigger harder cuts a very long time ago.
That's why him cutting a mountain wasn't even an achievement in itself in dressrosa. Like cutting the mountain wasn't a finishing move pulled out at desperation like the Daz bones fight. It was a stepping stone because he still needed to actually beat Pica. Because winning the fight is whats makes him better.
If you read all this then thanks