New dmg rule hasn't changed how artifact decks play entirely.
Reading type 1 decks that win, several of those artifacts still get played today.
How has new dmg rule affected Mirrordin cards to some sort of unplayability? I never even said play a full mirrodin deck for T1 tournament play or even casual. Besides you'd be crazy to pass up some of the artifacts and stuff back before Mirrordin too, my mind is a bit fuzzy but I know Lion's Eye Diamond, Tolarian Academy, Metal Worker, and Moxes come to mind.