They aren't going away, obviously, but it's pretty safe to say they didn't come at no cost
Commander's Sphere is also widely popular for similar reasons: You ramp and fix mana with this rock, and draw a card when needed (for 0 mana, even if tapped out!)
Several years ago, this led us to ask the question, "Are there different types of boosters we could make that would excite a different audience than what our normal Draft Booster is aimed at?" The first booster to come from this line of thinking was the Theme Booster
Living weapons on the other hand create a token creature when they enter, the Germ tokens have no toughness and would die on their own, while For Mirrodin
If you are feeling extra spicy reanimating Kaalia with Goryos to put Atraxa or Grizelbrand into play from your hand is also very cool and something AspiringSpike has been working on
The Wise Mothman, its Commander, dishes out rad counters and then grows in power as those counters mill cards and wound your opponents