Lost muscle memory and lost productivity. I didn’t really need to move the mouse much while using word programs, especially Excel. I think Microsoft stated during the transition the top end excel users lost something like 15-20% of their use speed? Something like that.

I actually miss the pop down menus that used to be accessible with the Alt key. Every single functional used to be listed there, albeit some things were sub functions, but the display had both icon and description. Icons alone are kind of annoying.

Ah! The other thing that pisses me off about the ribbon is that some parts of it are not visible until the use initiates a certain work type. Like picture functions are only visible if a picture is selected. What other hidden command groupings exist? A user can go poking around to discover what all Excel can do. Got to stumble into the magic combination of clicks to find what isn’t immediately visible.