This is cool. 40 card decks are great! In addition to being physically ergonomic, I find 40 cards to be a fun deck-building size. With about 17 lands, you get 23 choices to make of what to include outside of that, which feels like a sweet spot between deck-building expressiveness and decision fatigue.

As an aside, I'm convinced that a big reason WotC (and FLGS) are pushing commander so hard is because 100 card decks means you get to sell more cards.

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WillAdams an hour ago | parent [-]

Powerful argument for Tiny Leaders as a format.

(I still want to make a Commander deck which can be split in half, have one or two Commanders added, and work as a Tiny Leaders/Duel Deck pair)

	▲	moss_dog 40 minutes ago \| parent [-]
		Yes, Tiny Leaders is awesome! My own lil custom 40 card format is actually explicitly designed to be backwards compatible with any existing commander deck! You can just take a deck, draft from it (or just split it down the middle after a good shuffle), give one of the decks to a friend, and start playing! Some more info here (if a little self-promo is OK, as a treat): https://scry.fish/microEDH