#mox-artifacts

I was playing a game with some friends over the weekend and we got into this debate about Mox artifacts I think they're fine, but one of my friends swears they're too powerful and are making the format too stagnant. I dunno, I've seen some pretty sweet decks that don't even run them. What's your take on it? Are Mox artifacts ruining modern or are people just salty about their own deck choices?