Voidslime and Absorb are better in cube than other formats due to the low number of hard counters available
But you can comfortably just discard the off-color effects to hand size without much worryor even as a synergy engine all its own with cards like Inti, Seneschal of the Sun and other discard payoffs
Its worthwhile to build weird decks not for the masturbatory novelty but because doing so makes Magic more beautiful, more stimulating, and more fun
Magic has so much history, strategic depth, and formatting that cards that rotate out of one format usually have a home somewhere else
2001: Entomb from Odyssey Well, back in 2001, players might have argued that some combination of Psychatog and Upheavalwhich together formed the foundation of one of the era's dominant decksmight be even more broken
KTK also gave Sultai a thematic reason to exist, and thats to take advantage of your own graveyard with mechanics like delve and self-mill