Some decks need to recover many cards, while saving deck space for other cards, so Palmer's Contribution is still seen in some decks
And it's yet another example of how I think you aren't often designing good Commanders for Commander
Whether you were playing the games, trading the cards, or as I did quite literally pretending to be Pokemon with your friends, Mewtwo's place was well-established as the greatest of all time
Unless you are getting ready to die and desperately need a blocker, you will wait until you can protect it from whatever shenanigans your opponent has devised for your finisher
These can be used to plug up a Deck's weakness, counter the opponent's core strategy, or simply improve a Deck's consistency
This ability to completely stop your opponent from attacking has kept Wall of Revealing Light on the limited list for quite some time now