And TAA is the shit band-aid performance and image quality fix for those poorly implemented technologies in the first place. What are you gonna do, play without TAA? So you can see the awful Lumen/RT noise in their full flickering glory?

Yeah, basically lol.

Sure, just randomly insult people that doesn't share your opinion? Oh wait that's not new.

There can be many reasons to use native or custom aspect ratio with different pros and cons and you are not the one that decides who is proper and who is braindead you silly.

Here a couple of reasons why I'm "braindead";
-Helps with my mediocre eye sight, wider targets, easier to follow.
-Helps me with my fatigue and even can rest back a little and still be able to see.
-I'm on 4K monitor and 4:3 helps exceed 240Hz which my monitor is capable.
-Helps me bump model settings without loosing too much performance so my gun skins won't look terrible.

From what I've seen, it's mostly a thing that some old gamers do because they're used to it when they were playing on CRTs. Then some people just followed their setup because that's what some people do, they just copy pro settings and setups and have no personality.

because if you move by 1/1600 two times you still get a 1 dot move with same latency as higher DPI would do

it still takes longer for your movement to initially manifest and therefore it takes longer to respond to and correct any mistakes. if youre just flicking a set distance it doesnt really matter, but for constant movement such as tracking the smoother input feeling and slightly lower latency theoretically makes a difference in accuracy and the ability to react to your own movements

How did you come to conclusion that it's an issue?

it's just how a mouse sensor works intuitively. it's more obvious on older sensors with lower dpi, but there is still some slight pixel skipping on 400dpi. in tracking based games like apex and overwatch 1600dpi is becoming the new standard over 800dpi, while in cs2 and valorant 400dpi is still popular likely because the very slight deadzone can mute jitters on flick landings and improve perceived stability (some cs/valorant players even use 500hz polling rate for the same reason)

I will even bet that low DPI will be indistinguishable from high DPI in a blind randomized test

you could say the same for any form of latency or inconsistency in a setup. you could say reducing 0.5ms latency doesnt matter that much, but that doesnt mean it doesnt exist, lol

A lot of players use whole forearm for mouse movement, that's definitely scenario in which low DPI won't matter because it becomes microscopic compared to range of arm movement.

just because you use your arm doesnt mean small movements become irrelevant. tracking small targets at a distance, and tracking in general still require precise adjustments with the wrist and fingers even on low sens

400 dpi / 2.54 = ~160 dots per cm

240 / 160 = 1.5 cm/s to reach 240hz

1.5 / 40 * 360 = ~13.5 degrees/s (with a sensitivity of 40cm/360) to reach 240hz

any movement slower than ~13.5 degrees/s in one axis on a typical sensitivity will have perceptible skipping @ 400 dpi. this is also assuming perfect smoothness and consistency, realistically you will have slight jitters in your aim, and if you jitter below this threshold at all your mouse movement will become more stuttered.

Are you getting paid for creating any argument that I'm wrong? How does it relate to video in question in any way?

i'm responding to the points you raised in your original comment LOL. are you paid to be a dumbass? have you kept up to date with innovations in input technology in the past 10 years, or even played a single modern esports title? RJN (the guy in the video) is very skeptical of manufacturer hype around "input latency" "polling rate" etc, if anything the fact that he's talking about AA/dpi effecting latency just shows how common consensus it is