(This thread is partially in response to some of the posts in
https://kissu.moe/qa/thread/115066)
The way people look at civilization collapse, especially internet people, is a gross simplification of the way things actually work. Honestly, the term "collapse" itself bothers me, because it encourages that sort of thinking.
Civilizations don't fall apart over night. The most famous example of civilization collapse, the collapse of the Western Roman Empire, was a slow, incremental process, much longer than a single life time, and by the time it had fully died it might as well have already been dead. It's paramount to an old man in bad health dying of a heart attack; it's sad, but everyone knew it was going to happen sooner or later, and so they were prepared for it.
And to be clear, I get that a modern collapse would probably be a bigger deal than the collapses of yesteryear. We're more dependent on our infrastructure now than we've ever been, and our infrastructure is more dependant on technology now than its ever been. Things are definitely going to be different without them. But the process itself is still a gradual one; gradual enough to give people time to adjust to the new normal as it developes. We're not going to turn into Mad Max where we're all scrounging for resources and killing each other any time soon, and it's most certainly not going to happen over night unless there's a nuclear holocaust or something.