On the other hand, a taxibot would be working most of the time, while this system would be sitting idle most of the time. Not just sitting sitting idle, it woul

On the other hand, a taxibot would be working most of the time, while this system would be sitting idle most of the time. Not just sitting sitting idle, it would be weighting on the airplane while flying. EDIT: And this system, like the other one, would be just an alternative solution to the plane main engines, so if they were not working, not enough at peak hours, or not available at every airport, it wouldn't be such a big problem.