I recently worked on an admin project with a group of varying experience and grade, from months to decades using MS Office. It's the first time in years I've had to use 'ribbon' apps.

Not one of the staff used the ribbon directly, they just searched for everything using Word's titlebar search field and picked the option from the results. Every time, unless it was something like embolden that has a keyboard shortcut.

I tried hunting and pecking through the ribbon but it was such a guessing-game, trying to imagine where the UX designer had filed the option, that I eventually relented and started using the search field too.