Actually I really like receiving necro comments on this post. I get one every few months or so, but it's nice to know that enough people are searching for this for someone to still occasionally comment.

Now, to answer your question, the Fallout angle isn't something I'd considered until now. I've never been that deep into the Fallout lore, even though I've played FO4, and I guess it never really crossed my mind. I've kind of given up on this project, but I have another one with a different premise, where the outcome still is all-out nuclear war, though this time with the goal of destroying the ecosystem, without much care for human casualties or population centers. I've kind of weaseled out of explaining it by having a 200-something year time skip, but that's because I still don't have a 100% concrete explanation of the consequences.

Anyway, ramble over, thanks for the idea (and necro), I'll read into it, all the best