When I had a look at the link, I saw the illustration with the MS ribbon and had a good laugh. My French got to rusty to read the article and understand it well enough to comment.
The complexity of the ribbons is extremely high and was also one of the reasons for me to change to LibO.
LibO has with the 4.2 version the sidebar as a default implemented. This sidebar shows always the needed elements, which means you can reduce your tool bars/icons to the minimum you need. By doing so the screen becomes less crowed, thus simpler. Here, LibO offers a nice functionality if you have highly customizes (old) tool bars. You can customize the tool bars by just un-checking an icon instead of deleting one. Doing so, the icon is not displayed anymore but you can get it back quickly if needed.
Additional effect of the sidebar is that the screen is better used to see the document under work. Modern screens are wider than older screens if you keep the height constant. (It could be that the side ratio is HDTV format.) Therefore, with a broad ribbon at the top part of your screen, you see not much of the document but a lot of unused space left and right of the document. (Look at the top image in the article of your friend.)
If this functionality is still not matching your requirements, please feel free to write an enhancement request under: