Landing Slots! & ETOPS
I thought that one of the reasons of Wide bodied jets like the 747 were favoured by the airlines was the limited landing slots at popular Airports. Popular routes get a 747 to the 'hub' and smaller planes used to feed in and out I suspect most air travel expansion in recent years has not been on the popular routes. It would be good to hear how that aspect fits into current and projected travel.
"Engines Turn Or Passengers Swim"
I like it, have an upvote!
ETOPS "Extended-range Twin-engine Operational Performance Standards". ETOPS applies to twins on routes with diversion time more than 60 minutes at one engine inoperative speed.