This an incredibly tech-brained answer. "Sure, lots of OSS is difficult to install, breaks frequently, and lacks key features, but did you know Microsoft sometimes moves a menu item?"
I love OSS and I want it to succeed but "an item moved" isn't in the same ballpark as the barriers to OSS adoption.
I started the name calling by saying "tech brained" so I apologize and I'll ease off on that.
With that said, I have to strongly disagree with you. I use MS Office, LibreOffice, and Google Docs regularly, and IMO the ribbon was a huge improvement for word processors and spreadsheets over traditional drop-down menus. Drop-Down menus have their place but for document editing they are not ideal.