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Over my decades of experience with the show I've seen it transform from when the dollar amounts on the wheel were much lower, where the contestants had to "spend" their winnings from the round on a bunch of cheesy prizes, and where the tiles on the board were triangular and needed to be spun by Vanna. But while much has advanced—the dollar amounts have increased significantly, the contestants win the cash or trips or cars, and the tiles have gone to digital screens mimicking the old look—there is one part of the show that has not progressed as one might expect: Vanna is still by the board.
So let's acknowledge one thing:
If Wheel of Fortune were created as a new game show today, with the same technological capabilities that the existing show demonstrates (where the "tiles" can light up and display any letter, rather than need to be turned as was the case in earlier decades), it seems there would be no need for Vanna White. That's not a knock on her; it's merely the truth.