Earlier quoted context omitted.
> Who organizes things around application anyway, instead of windows? macOS. There's no Alt+Tab, for example: no way to switch between two arbitrary windows on the Z-stack¹. The not-equivalent that exists is ⌘+Tab, and it switches apps ; the usability of it, vs. Alt+Tab, is horrendous. (It fronts stuff you don't want, covering up stuff you do want.) There are workspaces … but I have found them hard to get productive…
How would a window-based ⌘+Tab even work? It'd be a million miles long and take forever to cycle to the thing you want.
Is this because you lose configuration if you close them, or because they take too long to open? Because you can't really use so many of them to make switching not viable on a single virtual desktop.