Perhaps my info on this was a little old, and seeing as my country might be one of the few to not have mass starvation in such a scenario, according to one of the studies I saw, I might have also been too optimistic about other countries' chances.

It seems nuclear winter could lead to an 8 degree maximum drop in temperature with a 4 degree drop after a decade and lasting a while. Perhaps. So, much worse than climate change at the current time.

Although I do still wonder about how close to reality the soot modeling is due to possible new materials and differences from countries, which might make a big difference on the actual result, either for better or worse.