I just tested on my 4k display and 150% and 175% were not blurry at all. I'm on a 32 inch 4k monitor. Is it possible this information is out of date and was fixed by more recent versions of macos?
Interesting, maybe it just doesn't bother me, because I do not notice it at all. I was looking at black text on a white background. Maybe it's less of an impact on Q-OLEDs with their pixel layout perhaps? I just checked and I actually run my ultra-wide monitor at 125% resolution and the text looks crisp. That one is a regular LED display but it does have really high pixel density (5120 x 2160, I run it at 3360x1418)
