Yeah - my solution was to not do that because I don't like having multiple monitors with mismatched resolutions anyway and I don't care for HiDPI for work. Every monitor I own is 1080p, even my laptop screen. My Macbook Pro is the only HiDPI computer screen here.

I'm not even sure what the point of HiDPI is though. It never made a difference for my work as a web developer. I understand it's more pixels per inch and less pixelation for high-res images, but if everything is getting scaled up what's the difference?

My (Windows 10) gaming rig used to be hooked up to a 4K 50" Samsung TV but I think the max I could get was 60Hz. Games and movies look pretty good there, but eventually I switched to a cheap 1080p/144hz gaming monitor because I play Rocket League mainly and that is a fast action e-sports game where you want to see as many FPS as possible.

I don't know about gaming but for daily desktop applications and coding I would never ever use a low dpi display again.

On a 1080p I can easily see individual pixels from a mile away and everything looks simply bad. I can not stand text on a low dpi screen.

Also, when I use 1.5x scaling, I have 1.5x more real estate. Hence my requirement for the fractional scaling. Even on 2x scaling (effectively turning it into a 1080p display) everything looks much better than a native 1080p display.