Having never seen it, or anything even close to it. (Of course, I'm a little biased by seeing product demos that don't even get "add another item to this list

Having never seen it, or anything even close to it. (Of course, I'm a little biased by seeing product demos that don't even get "add another item to this list of command line arguments" right; maybe if everyone already believes it works, nobody bothers to actually sell that?)