It seems to be so easy to implement and everybody knows the problem: you take an elevator, you click the wrong floor and now you have to wait awkwardly on the wrong floor for the doors to close again.
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The elevator doesn’t have a way to “know” if the person undoing the button press is the same person as the one who pressed it in the first place or someone else. It can’t tell the difference. The same feature that lets you undo your mistaken press would also let a selfish ass remove all the other riders’ floors from the queue in order to arrive at their own faster.
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