Do you... usually read content in a full-screen window on that thing?

I only have a 27" monitor and sit about 2.5 feet away from it and I move my head _slightly_ to focus on different windows. But that's the reason I have a larger monitor, so I can have a bunch of normal-sized windows open at once.

Their point may be about viewing distance.

If the edges of the screen are further from your eyes than the center, the content and text doesn't appear at the same size. If you wear glasses, the edges might even fall out of focus unless you physically move closer.

I like having three columns of code open in my editor, but the left edge of the leftmost column (since code is left-justified) gets pretty far away from my face. Or I need stronger glasses, one of the two.

I think it depends on vision. I have a single 27" 4k monitor with vscode set to about 80% zoom.

But I'm getting older, so I might have to make it a big bigger soon.