For safety reasons, NO more oversized backpacks or suitcases on board of an aircraft

As the accident in Russia made visible and personal travel experience over 20 plus years, any hand luggage bigger than a handbag or laptop case is a hazard in case of an evacuation.

Passengers do NOT leave there things behind, so they need to be so small that they are not harming. Also all related processes, from security checks to on/off boarding would be benefiting tremendously.