A couple pages ago, someone said something about Aether Vial being format warping, and then someone was like "oh hey, MMS got played way more than Vial, therefore you're stupid" (essentially).

While we're on the topic of social influence determining what gets played, I want to point out that a card doesn't have to get played a lot to warp the format. As long as people are thinking "I lose to Aether Vial, I need to play something that can deal with it", it's warping the format. It doesn't matter if no one plays it.

I think this is a big part of what I liked about MMS--it didn't have that huge of an impact on actual games I played, but because it was around, more people were scared away from playing storm (I suspect).