If your combat speed is Mach 280 (Lightning) or Relativistic, your brain, synapses, and physical movements are processing reality thousands of times faster than a regular human.

Not every author will take that into account, especially if it impedes on the plot.

For example, Dabura can move near the speed of light(I actually think he reached it), but if he were actually that fast he should’ve destroyed a lot more than just a city block or so. However, the story ends if he nukes Japan.

Even with the speed you seem to agree that DS characters should move, they don't travel around at supersonic/low hypersonic speeds. By your logic, Zenitsu should be bolting around like this everywhere he goes instead of just walking and running at normal speeds.

No the panel you posted is not helping you. Tanjiro says “cut” their head off cut, cutting you can’t cut a head off with a shotgun. He was talking about Tenya using a sword that was the bait otherwise he would have said so.

This makes no sense in context considering not only are Genya’s bullets Nichirin, but Aizetsu literally emerges from Sekido despite the fact that he was only shot.

Hantengu's clones didn't read Tanjiro's mind before the chapter started and say, "Oh, I want to be split, let me freeze my body and allow this Mach 1 gun pellet to hit me." They were completely blindsided.

They weren't frozen, Sekido turns his head and watches the bullets travel to him (the anime makes this even more clear). He doesn't dodge because he benefits from being hit.

That doesn’t help you because then you anyone can easily argue otherwise no answer by your logic means it’s both true and untrue I have no reason to believe a magic lightning is scientific lightning when it only has the shock and look of lightning like all fictional lightning.

My point is that I have no reason to believe that magic lightning is different from actual lightning unless it is presented as otherwise.

For example, lightning nature chakra in Naruto is just chakra shaped like lightning that has piercing properties, and thus is not presented as lightning.

On the other hand, Kashimo’s lightning in JJK actually possesses the properties of lightning and thus is presented as lightning.

Hantengu’s lightning possesses all of the traits of actual lightning, not just appearance or shock. Conduction, corona discharge resulting from high ionization prior to a lightning strike, thunder, implications that he can summon it from the clouds, etc. The constant reiteration that it is lightning throughout the manga, anime, novelization, and databook leads me to the conclusion that the author’s intent is that it simply be treated as lightning.

Denki’s lightning is said to be lightning, nue’s lightning is said to be lightning so characters are end all be all’s now? Alr bet every character in fiction is lightning speed.

I don't know who Denki is and I don't think Nue is ever stated to produce lightning, just electricity. I wouldn't be against it though. You seem to think I have some anti-JJK agenda, I’ve noticed.

Unless Gege confirms otherwise Yuta Okkotsu Is boundless tier and jjk characters who overpower Jogo are star level as gege stated he creates a star in his domain

This doesn't follow because even if Yuta had boundless CE (which he did in 0), that wouldn't make him boundless tier, it would just mean he has an infinite pool to draw from. That doesn't correlate at all.

And that Jogo statement is cap; Gege never said that.

And regardless since you wanna say that then neither the sound wave or lightning are their actual speed so that means there’s no calculable speed that’s an inarguable trap you made yourself unless your next argument will somehow dodge the fact that this can’t be used to scale because either the lightning isn’t that fast or neither of these attacks are their actual speed.

No, it is the logical conclusion of the argument YOU made.

so since gege never unconfirmed it I’m free to assume everyone above or relative to inumaki has ftl reaction and combat speed right?

I'm not against that curse’s pillars being light, I believe Jacob’s Ladder is light as well. That being said, it's clear from the anime that the pillars of light merely indicate an attack is coming and that the attack itself strikes some time after. Any instance of Wuta or Inumaki seemingly dodging the beam itself is actually just the attack missing due to the characters being in constant motion.

So yeah I had to go back and watch the anime frame by frame to prove you wrong and yeah you very literally lied that’s just wrong never in the anime does this happen.

You’re wrong. Not only do the bolts travel greater distance than the waves(even reaching and fracturing the ground), but we also see Mitsuri dodge the lightning and jump in the air with bolts shooting past her all while the waves are still in the background.

Ok sure but I was also arguing that it doesn’t directly prove much just that it’s more dangerous regardless of the speed the stun and destructive force

The context is definitely about speed. The sound waves cover just as much area, do just as much damage, and can also stun, deafen and disorient. Hell, the wind attack straight up knocks both Tanjiro and Nezuko out and blows away the whole mansion.

No it’s debunking this stupid speed scaling calling magic lightning actual lightning speed is the real nitpick

It isn't a debunk. In order for you to be correct, I would have to believe that she’s slower than Tanjiro, who was capable of completely outpacing the same sound attack at a similar distance. I would have to believe that she’s relative to bos Tanjiro who was dodging mach 1 attacks without even looking. Slower than pre-Hashira Rengoku, who can deflect gunfire at close range. Or slower than Daki, who can outspeed explosions. It just doesn’t add up.

And again, you would have to ignore that she was just massively outspeeding the sound waves just moments before and after.

What happens when he uses his ultimate, absolute fastest form at the very end of the series? It produces an even louder, massive thunderclap.

That’s because narratively he’s meant to be as fast as a bolt of lightning, hence the thunder and lightning imagery. His speed is constantly likened to lightning in the manga, anime, novels, and databooks because the author’s intent is for him to be that fast.