Eventually, airport infrastructure will not be able to support the growing number of flights, especially in Europe and North America, where very few airports have been opened and/or expanded in the past few years. It would be more beneficial, especially for airports, to have a 500-seat aircraft utilizing a slot rather than a 50-seat jet bringing only a handful of passengers. https://simpleflying.com/emirates-chief-believes-airlines-buy-a380-again-mods/