I have poor eyesight and need to sit closer than normal, and I find 27" to be just a tad too large. In my home-office setup I have a decade-old 24" 4K IPS panel that is the perfect size, and I dread the day it gives up the ghost because apart from some very expensive professional monitors, no-one seems to make them at that size and resolution class any more.
2x dell 2415q's is my favorite setup I've ever had. I hope that some more options for high-dpi 24" monitors come out in the future.
After 27" 4K OLED last year, I suppose 24" are next! I didn't have the patience to wait and I have migrated to 27" 4k OLED (Alienware).
I really like my two BenQ RD280UA. They are as wide as an 27” and as tall as an 32”. For me it’s the best Aspect Ratio for desktop screens.
The aspect ratio on the RD280UA looks great but I wish they offered a version with a PPI similar to that of the 27" 5k Studio Display.
I can't afford a giant monitor that displays text well enough for work use.