Earlier quoted context omitted.
As a casual user of the various Office apps, the ribbon bar is what made it usable. Before that, I'd make every attempt to keep out of Office. Those who use it with any regularity likely know the keyboard shortcuts for things they use regularly, and the ribbon should work for finding the less common things in the same way it helps me as a casual user find everything.
The ribbon bar made it more usable? I just found it annoying. Word 2003 still seems like the best form factor to me.
It would seem that most UX people now agree with me, as traditional menu bars have been de-emphasised across nearly all the apps I use. Word was the only app which required me to delve into the menus in common use.
Why do you think the ribbon bar has a worse UX than a menu bar?