I am currently on Windows10, my work laptop has Windows11, I have been using taskbar on the top of the screen since probably Windows7, I can't see ANY use case for bottom taskbar, since all my work is usually being done from mid screen upwards, plus my head's natural orientation is from middle to top, plus Microsoft's Windows explorer and basically every application window has menus ON TOP and "close/minimize/maximize" again ON TOP....basically the ONLY thing at the bottom of the screen is the Taskbar. Any time I need something from the taskbar, I would have to drag my mouse to the bowels of the screen just to click something, then it will go again up towards the middle-top....useless movement, zero ergonomics...
I guess Microsoft had to fill that void up with something, to not make it look like the windows are in danger of falling off the screen due to gravity? :)))))
Anyhow, my Windows10 update is practically begging me to switch to Windows11 for free....but honestly, the fixed bottom taskbar is a dealbreaker for me. Hope Microsoft listens to reason (for once) :)