Would that be faster though? You still have to stop the entire train just to get one unit in or out. And if it's more units, chances are that parallelization hi

Would that be faster though? You still have to stop the entire train just to get one unit in or out. And if it's more units, chances are that parallelization hits a capacity bottleneck because of the inherent cost trade-off between having lots of cranes on standby vs just waiting a little longer in the rare moments of action. Are container cranes used for routing within a rail network at all? Might well be that they are only ever used for mode change at the edge, despite having been mature and available technology for decades.