About the only other thing I have seen anywhere close is Grave of the Fireflies, but maybe because that one hits really close to home since it's similar to the story of my grandmother and great uncle in Japan during the war. Only thing I think Threads screwed up on was when they had the English language devolve in the first post nuke generation because there is no schooling, when language is learned from speaking and listening and not from going to class. But everything else, first rate.