You know the ribbon can be collapsed so that it behaves more like a drop-down menu, right?
Having used Office products for 30+, my most-used feature of the Ribbon is Search, because I don't have time to waste hunting through a poorly-organised heap.
Also, classic button bars were customizable. You could add/remove/group buttons in any order you like. And there were lots and lots of buttons that were not present in any of the default toolbars. The ribbon is fixed AFAIK.