I remember watching a video from Wendover Production talking about the decline of 747 and A380s mainly due to a lack of guaranteed passengers to fill the plane routes in both directions. Exceptions being some airlines which are able to operate hub and spoke models and where fuel is cheap like the middle east airlines. Wouldn't these types of planes be more suitable for a role in logistics which can benefit the greate…
Not sure if it would make any economic sense, but maybe it could if the layout could be changed rapidly, with a passenger cabin "slotted in" when needed.