Im sure we all predicted the Modern mill deck picking up Ruin Crab from Zendikar Rising, but a fair few of the decks have also been playing a suite of Thieves Guild Enforcers to help things along as well
The decks adaptability allows it to face various meta threats effectively
Ancestral Recall is the classic example in Vintage, forcing players to have an answer on turn one or risk falling impossibly behind
Stack Control and Tempo Interaction [cards] Counterspell Mana Leak Spell Snare Force of Negation Wash Away [/cards] Core counters like [card]Counterspell[/card], [card]Mana Leak[/card], [card]Spell Snare[/card], [card]Force of Negation[/card], and [card]Wash Away[/card] let you stop opposing commanders, planeswalkers, and combo turns before they ever resolve
From Mirage on, the standard for booster boxes became 36 booster packs per box
The lower the mana value, the better