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The thing is, didn't the Braves' really only have Maddux/Glavine for most of the run? They had their share of Smoltz and Avery finishing up the trifectas, but behind the Big Two, it was mostly fungible, including Ace of the Year performances by the aforementioned four.
Having a core two can really tilt the division for a long time. It's a good strategy, especially in a 4 team division.