The A380 did have a USP in that it was a full length double decker. Well it was a USP to me as I wanted to fly on it from the day if it’s launch, I have flown the bird many times and the both up and down cabins feel huge and airy compared to a 77/787. I flew 737max from New York to EDi and never again. It is interesting that civil aviation has always moved forward to bigger and faster planes since the first days of flight but now twice in the space of the last two decades we are moving backwards to smaller and slower aircraft.