[Aaargh20318]

The 2560x1440 equivalent looks tack sharp on macOS. It renders at 5120x2880 and scales it down to native, as I said it’s effectively supersampling. I used this for years and never experienced a blurry image. I now run a 5k2k monitor, also at a fractional scale and again it looks excellent.

[manderley]

It very obviously is blurry, though. There's a reason so many people notice this issue, you're not going to be able to explain it away.

[Aaargh20318]

I have eyes, and recently updated subscription glasses, I can see what it looks like and it’s tack sharp.

Are you sure you aren’t confusing Window’s terrible font rendering with sharpness?