Some part of my brain filtered out nuclear winter, which cannot reasonably be prepped for by individuals or small groups. However, that is just one, relatively unlikely, thing to prep for. Most other disasters are shorter-lived, and have a great deal of overlap in effective mitigation strategies. Prepping, in my mind, is not only practically useful for various classes of emergencies, but is good mental exercise for understanding supply chains and what's actually needed in the sort, medium, and long term. It can also be good for sharpening skills that benefit others and build community, which in many ways is more rewarding than knowing that you'll be the sole survivor. Prepping doesn't, and shouldn't, look like Burt from Tremors (as amusing as that may be).