It's also hate that doesn't necessarily conflict with some other artifact strategies the way Stony Silence and others might - if a player has more expensive artifacts in their deck, for instance, Meltdown is still a great sideboard card that likely won't destroy their own game pieces but will still affect a cheaper-costed deck
Especially if we're talking about value cards like Decree of Justice that build up your board
For competitive players, the value is limited
While this doesnt spiral out of control quite as fast as a card like Cathars Crusade can, it still plays a solid role in any white deck looking to go wide with small Creatures
There are a surprising number of Snakes or cards that make Snakes in Golgari, such as Ophiomancer and Hapatra, Vizier of Poisons
The big problem is, shes not very powerful: shes five mana to get one discover trigger