While its less true than it used to be (thanks to FIRE design, cards designed for Best of 1, and increased modality/card draw in general), its still a key part of gameplay and it feels like what this mechanic, and in particular, gifting a card, was designed around
As we saw above, Scute Swarm is a good example of a self-replacement effect
When an English card does achieve a perfect grade, it can command a significant premium precisely because its tougher to attain
Best Cards The Master of Keys: The secondary commander for the deck is also very strong, and has even seen peeks from the competitive EDH scene, as a cheap enchantment reanimator
Something always does
Mana Crypt taps for 2, and Mana Vault, Thran Dynamo, Basalt Monolith, and Grim Monolith can tap for three easily enough and make even more mana than 5