> With today’s wide screens, a vertical menu bar at the side would perhaps make more sense than the usual one at the top, though, similar to vertical tabs.

Yes, please. Bring back the NeXTSTEP menus for desktops! But on laptops, it's still pretty common for almost all windows to be full screen most of the time, so having the menu bar at the top of the screen is still the best choice for that environment.

That gap between what's best on a laptop and what's best on a desktop with large or multiple displays has been growing since desktop displays broke free of the 1080p but they were stuck in. But I don't think it's anywhere close to wide enough that Apple or Microsoft would be willing to implement different UI paradigms. It's hard enough getting them to understand that tablets and laptops need different UIs.