Theres also the issue that most set mechanics are implemented with some kind of setup/payoff dynamic, where your best outcomes revolve around mini-combos of specific cards
Even Legacy Reanimator pulls it in now and then, especially when they need a clean answer to cards like Ensnaring Bridge that would otherwise shut down their win
Often, players use tamers to have permanent color sources to use option cards, as well as support their in-play Digimon, and/or give themselves extra memory to extend their plays
Items can be used immediately and have passive or activated abilities
When two cards are exiled and melded, they each leave the battlefield, then return together as one new untapped object with no relation to either of the objects that left the battlefield
Spell and Trap Cards are destroyed with no calculation done