Originally Posted by
Excargodog
Aerodynamically more efficient? Possibly. Economically more efficient when you consider the existing A320 family worldwide logistics and training infrastructure? Far less likely.
Fuel burn is going to be the metric that punches well above its weight, if current green trends play out. Either due to a need to reduce burn/emissions, the high cost of SAF, or both. Also while the bus is newer than the guppy, it's still 40 years old. A clean-slate design could have enough baked-in economic advantages IMO.
Boeing has a well established support network.