We had an unlucky encounter where we had to depart the aircraft after boarding, Soon before the scheduled takeoff time, and re-board. The key reason why specified was that a passenger felt unwell and needed to terminate their plans and therefor their luggage needed to be found and eliminated. See https://businessflightslondontosydney.car.blog/2024/12/07/how-to-select-the-right-christmas-vacation-package/