I never understood why people struggle with window management, but then again, my primary setup is to use a tiling window manager where I either keep a single full screen window in a workspace or a very simple side by side split, or 1x2 split or 2x2 split as appropriate. Possibly one hovering window that I call up/hide on demand. And then I just keyboard shortcut between workspaces. For multi monitor, I dedicate some workspaces to each monitor (and occasionally move windows between then if needed, but it’s not so often). It’s easy to switch between workspaces because I dedicate them to specific tasks, eg 0 is messaging applications, 6 is my IDE, 7 is browser I use for development (dev tools open tiled beside the browser), 8 is terminals etc

More monitors just mean some workspaces are switched between by moving my head instead of switching what’s on screen. For some tasks it’s easier for others it’s not.

I do find a larger higher resolution monitor more useful than having two or three small ones, especially for my IDE where I have splits and such. I use a 34” 1440p currently but would love to go larger/higher resolution (but 4K at those sizes is out of my budget right now)