I am just not reading these things closely enough on Comixology, I think.
I guess I always think it's an oddity of the modern superhero genre that things always recover so fast; not just cities and physical space, but attitudes. It's happened after every Crisis and it happens here. If the war was five years ago and places like Metropolis and Italy were completely destroyed - Superman says his city is dead - then the infrastructure was in place for Jay and Joan to start college within two years.
People went on about 9/11 for years, and that was three events on one day. Does it seem reasonable to set up an apocalyptic event, following which society looks exactly as it did the day before that even started?