> At some point some PM declared that every menu-accessible function needed a corresponding toolbar icon and the carnage started.

I'm pretty sure Office had customizable toolbars, so yes, every menu item should be a toolbar item, but it's unlikely that anyone actually wants them all enabled. And yeah, customizing toolbars is pretty far up the learning curve; so I understand the motivation for the Ribbon, but I managed to stop using office before I had to experience it, so I don't know how well it actually worked.