I have a dual 4k/1080p(480hz) oled monitor at home I mostly run at 1080p and 4k lcd monitors at work. I bounce between both and really don't notice much difference. I need the text zoomed on 4k anyway, so it is effectively 1080p screen area, but sharper. Growing up in Atari days I don't mind pixels and actually like them. Latency and the 480hz is more important to me than 4k pixels.
I grew up in the Atari days too but I really need the HiDPI. I run at 200% scaling too, so effectively also 1080p. But I really love not or almost not being able to see pixels.