Sure, there have been times where the same archetype has won the Vintage championship twice, but take Mark Tocco and Brian Kellys Oath decks as an example
Card (Charlotte Pudding) FOIL NNO DON
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One card giving you the option of a second copy of your best creature late in the game versus a land early is absurd enough that this often makes the cut in my blue deck regardless of whether my strategy cares about clones
Some examples: Swords to Plowshares, Teferis Protection, Chaos Warp, Great Train Heist (or other Spree cards, you pay extra costs but can go wild), Akromas Will, Deflecting Swat, Wear/Tear, and my personal favorite, Reprieve