It's catching
I read the same thing yesterday in a review of the latest KDE Plasma. So long as they haven't broken the alternative cascading menus it'll be OK, otherwise I'm not looking forward to it landing in a distro I use. Why do UI developers insist on fixing what isn't broken and leave the irritants in place? (In KDE's case, restore the ability to specify using just the corner to unhide a panel that was removed in KDE 4.)