The problem with the A380 for freight is that it has a lower cargo density. That is, it has a much greater interior volume than other planes, but not as proport

The problem with the A380 for freight is that it has a lower cargo density. That is, it has a much greater interior volume than other planes, but not as proportionately greater maximum cargo mass. This is great for passengers (more legroom, etc), but not so much for cargo. Unless it's a shipment of guitars.