I suppose having some form of detection “engine” at the ready even if it’s just sitting idle, (if that is really what Apple is considering and it’s not just speculation waffle), makes sense in the longer term…..if that one day comes where all us Mac users come under attack!? Quicker to download a signature than a complete application when time could be of the essense. But if gameovered….doesn’t matter anyway, Hmm….Nothing new here.