Always fun to speculate on what would happen in TEOTWAWKI but there is slim to none chance of it happening. Human society has evolved for thousands of years. That accumulated knowledge just won't disappear over night. Better to spend time, energy and resources on preparing for things that we know are going to happen than wasting it on fantasy.
Agreed ... also, the scenerios have way too much left leaning, tree hugger b.s. Like "now without the evil, polluting humans, pristine nature returns, and mother earth heals" bla, bla, bla.
The tin foil hat on my head makes me wonder if they aren't conditioning us for extermination ...
well, probably not ... but, I'm not a big fan of those "after people are gone" shows.