It's hard to keep the planes full if you don't do a variation on hub and spoke. It is also expensive to have sorting facilities everywhere. Could you theoreti

It's hard to keep the planes full if you don't do a variation on hub and spoke. It is also expensive to have sorting facilities everywhere. Could you theoretically be more efficient? Sure. But it's much harder to buy planes, plan new flights, build a new sorting facility and train staff vs you just running your simulation again on the command line with different parameters.