There is nothing wrong with using them, except that (as the article points out) they don't work terribly well, take a lot of effort to get right, and aren't the

There is nothing wrong with using them, except that (as the article points out) they don't work terribly well, take a lot of effort to get right, and aren't the focus of the editor. Sublime and Emacs are joys to extend versus Vim, that doesn't mean it can't be done, just that it is tough.