User blog comment:Susanolivia/Fixed Width, Sidebar, and the Removal of Monaco/@comment-591173-20101011170429

Every screenshot you have shows that you are operating under the delusion that all people browse with full screen, wide-mode browsers.

This is false. Many people use the browser side-by-side with other programs. Many people still have 4:3 displays, or flip their 'wide' displays to portrait orientation. *Especially* people who work with a lot of text. So they can read it. Like.. editors.