I don't think the objection is about while you're working on it, it's more about when you walk away. Rarely do we begin and end a project in one sitting, so we leave it threaded for the next step. It sits agape, its Jet Age sleekness torn asunder, a spool of yellow thread leering at us. Mind you, of the things in the world to be concerned about, this is lower on my list than the padlocks on the Pont des Arts - but, when I step back from my Rocketeer, I do like to admire it in its undisturbed, aerodynamic mid-century splendor.