I never do any explicit scaling.
I just use screens on their native resolution…
My screens at home probably count as LoDPI, as both of them predate the first retina, and therefore the HiDPI hype.
My screens at work ar both 4k, 19". Don’t want to count actual dots per inch now 
Though as far as I understood you @OvermindDL1, my mobile counts as HiDPI then, as I use a Pixel 4 XL as you do.
There is also a “fallback” screen I sometimes use, Its a 32" 1080p device from ~2005… Its regular use is as a screen for our home-media setup. (Its a plain old dumb-but-“flat”-TV)