Designer here. I agree that sometimes there is an over-emphasis of sticking to the rule of icon - title (if it's already been defined) and finding icons for features that are very hard to describe through a simple pictogram, thus leading to non-helpful visual cues for menus and menu items. But, icons to me has never been about being a perfect encapsulation of the meaning of the feature, it's more of a visual anchor, eg even the examples in this article without icons require me a couple more milliseconds to scan just to find the menu item I'm looking for. It's a visual anchor first, a descriptor second.