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)

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