Less Load = More resources to use = more frames = less latency = On ANY hardware, unless your frames are running capped maxed 100% of the time.We did that long ago. Real long ago. And UT had horrible input handling in the first place so no way you'd fix that by running low. Not running games on potato helps a lot regardless of time we're in.
I don't know what input latency we're talking about since I'm talking about times when BF3 popular. Back then, only input latency I can remember was from using zowie mice. Switching to logitech fixed that real quick.
So example: You're running CSGO, but it's capped to 300fps and you hit 300fps 100%..There's not much incentive to lower anything in this scenario.
Streamers and even professionals still do this today. Usually you want to keep the resolution native but there are benefits from lower, stretched resolutions. (back in the day you could get much higher refresh rates from lower resolutions on CRT monitors)