Is it?
The first time we see it is from luffy. Which I guess is supposed to be cool and impressive to show how much stronger he’s gotten but the ability itself was never specifically hyped much
In punk hazard we met Vergo who had extremely hyped up armament. Him being capable of hardening him and his weapon. Smoker was capable of doing the same thing besides full body while also being less proficient
Then all of a sudden zoro being capable of hardening his swords becomes a hype moment. Not to say it’s not impressive I guess but it’s only weird because that wasn’t the case when we saw other characters being capable of the same
Kinemon is also a pretty weird case where him being able to harden his swords was never really hyped up in dressrosa but it kinda was in onigashima. Him using armament the whole time against kaido but getting a oden flashback talking about armament right before using hardening
Even fodder has shown the ability
Hell even characters like Kiku marigold and pre timeskip zoro were capable of armament flow an advantanced application but not hardening
Going back to the strawhats
- Luffy was capable of basically spamming the technique with it never being specifically hyped much
- Zoro being able to do it was lowkey made a big deal. With zoro only really using it when pushed to get more serious. His current post wano self being able to do it a lot more casually
- Sanji has straight up just never shown hardening on screen despite the fact he obviously has armament haki. If you disagree show panel of him doing it




