Having three buttons and one door. You can select all 3 buttons, and On pressed you can eyedrop the lock device on the door to open. Done in seconds.
We need that, because right now in UEFN you can only do that if you have 3 locks and one button, because only the result can be multi-selected and set, not the action. And the action matters more when having 100 chests and one item granter, you have to set 100 events inside the item granter all manually now and its very time consuming and bad UX.