I wonder if you could build a passenger pod which attaches to the airframe. The pods get swapped when the plane comes in to the terminal. The new pod would alre

I wonder if you could build a passenger pod which attaches to the airframe. The pods get swapped when the plane comes in to the terminal. The new pod would already be fully boarded, and deplaning people on the arriving pod would not hold everything up. I guess whether this would be worth it or not depends on whether the advantages of "0 boarding time" from the airline's point of view offset the cost of the infrastructure and extra weight required to support such a system. From a security point of view, you could keep the pod completely decoupled from the other parts of the aircraft (e.g. no cabin access, not "coupled into" control systems).