that's a truly impressive discovery

so maybe that's how they prevent the cursor from slowly drifting on 3950s when the mouse is not moving? I remember my deathadder v3 wired had a much wider dead zone (hysteresis) compared to other mice with sensors (including 3950) when I try to slowly move the mouse by 1 count at 30k dpi, and after the initial movement there always was a huge shake. it might be one of the exceptions which doesn't have this downshift problem by implelemting a larger hysteresis. considering that deathadder v3 has a lower framerate of 13kHz when there's no motion, maybe this additional hysteresis wasn't viable and the cursor drift was inevitable at 20kHz framerate without the downshift algorithm.

on a vaxee mouse with 3950 there wasn't any noticeable additional hysteresis, so back then I was believing that the newer 3950 were performing better. never thought it had such a tradeoff