i swear 400 dpi is such a sweet spot 1600 feels so weird when ur just on your browser and i've been on 400 for so long that 800 feels weird aswell i use 400 .45
400 is too low, the higher the better with diminishing returns, but 400 is at the point where it becomes detrimental (because of polling rate or something). I would say try get used to 800
ive been on 400 for years can’t use anything else for gaming and i think im at like .47
but it feels slow for me in regular desktop use like my work mouse is at 800