It's just unfortunate, because it started the trend of reducing and hiding functionality. With less examples of what high density software looked and worked like, people don't even know what they are missing.
Then they briefly tried to push the one interface for every device holy grail with Windows 8 and UWP. Thankfully that was abortove, but it's still poisoned things more and hurt information density in its fallout.
Did you tried to use it ? For every god damn thing i try to find in the ribbon i lose 5 minutes. That's what i call "hiding functionality" .
Microsoft have put together an awesome guide to the Ribbon. Even if you're not making one, it's a great read that really goes into the reasons it exists: https://docs.microsoft.com/en-us/windows/win32/uxguide/cmd-r.... I came across this page by chance when I was in high school, and I think it was what sparked my interest in user interface and user experience design.