I think there’s one group of people who consider preserving the physical dimensions important that like the macOS approach. For me, if a window is across multiple displays then it’s already broken up and I’m not too bothered about that. What I care about is getting application UI to a reasonable size without blurring. MacOS doesn’t do that.

Actually, the default in MacOS is that the window is only on one monitor, and its the monitor where the cursor was when you last moved the window, so you might have a window appearing invisible because you dragged it near the corner and some sliver ended on another monitor.

Look at this complicated tinkering MacOS makes you do for something as simple as spanning windows across monitors! https://www.arzopa.com/blogs/guide/how-to-make-a-window-span... (OK this last part is slightly facetious but Linux gets dinged for having to go into menus because the writer wants something to work the way it does in on other operating systems the whole time)