That's because they are good, not elite.I think the NFL Is evolving, defenses seem to get better and better and the scrutiny of the QB position is forcing teams to show next to no patience at that position.
Of the top 20 QB's in the 2021 season, just two years ago, 11 are on either different teams or retired. And some that are on the same teams didn't play much this season due to injury.
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Teams actually want to win Super Bowls. It takes an elite QB to do that.