[lproven]

What for me is really strange, in a way, is that the Mac versions of Office did keep the menu bar, and still do. Until I upgraded to Monterey late last year, I was still using Word 2011. It has the ability to completely hide the entire Ribbon. That suited me well.

But Office 2011 is 32-bit and no longer runs. Now, I only keep Word around. I've been forced to update to 2016, the oldest 64-bit version that'll run on macOS 11 (AIUI).

The menu bar is an inextricable part of the macOS UI so it would be hard to remove, but it demonstrates perfectly that Office for Windows could have kept both UIs, because the macOS version did.

My normal mode of operation in Word for Windows uo to 2003 is just to turn off all the toolbars, and the horizontal scrollbar, and the ruler. It runs well with nothing but a menu bar and every feature is usable.