Noreen Malone’s case — please hear her out — against the em dash:
What’s the matter with an em dash or two, you ask?—or so I like to imagine. What’s not to like about a sentence that explores in full all the punctuational options—sometimes a dash, sometimes an ellipsis, sometimes a nice semicolon at just the right moment—in order to seem more complex and syntactically interesting, to reach its full potential? Doesn’t a dash—if done right—let the writer maintain an elegant, sinewy flow to her sentences?