No it doesn't. You can't prevent people from being a-holes and stealthily pressing 10 buttons before leaving the elevator. The feature as described is as useful

No it doesn't. You can't prevent people from being a-holes and stealthily pressing 10 buttons before leaving the elevator. The feature as described is as useful as pressing a floor to stop on. Perhaps it makes more sense on smaller elevators than it does in large ones. Or perhaps it would make more sense to allow undoing a press only within the first few seconds.