Earlier quoted context omitted.
I basically never do full screen, so for that reason I'm not bothered. (In fact, now I'm _less_ bothered, since I somehow no longer feel like the menu bar is "wasting" space.)
I never use the "fullscreen" mode either, and don't understand the point of it. But you don't ever have a window that spans the full vertical space of the screen? You can hide the menu bar and have it only appear on mouseover, thus not wasting space. Except on non-notch Macs you can place windows where the menu bar used to be, and on notched Macs you can't
The rest of the apps have app UI on the same row as the Close/Minimize/Zoom buttons which would be hidden by the notch.
But empty toolbars is a good usecase for rendering an app window on the notch. I'm actually surprised how many apps utilize that space!