Mono-Green Devotion is the second most popular deck in the format, and it is an incredibly good matchup for Auras
There are eight MTG card types in total, each one representing a different aspect of the game
Festival sticks around permanently, however, with the trade-off that your spells damage you when you cast them
Six mana is a large barrier to entry for this effect, which will make it more difficult to use in older formats
As you dont technically need six copies of Solemn Simulacrum, you can save time resleeving between decks by having a proxied card in each of your EDH decks, and a side deck with the real cards in
I've had a ton of games with Bogles where you flood out and are stuck just sitting on a ton of excess mana with no way to utilize it