The finer point of disallowing these topics and subjects to live around here is that the inexperienced like to shout over the top of the people who know. The inexperienced and daydreamers like to drag discussions off on unhelpful tangents.
The only real value these threads have is for people to talk about what they have and why, based on realistic experiences in 1st or 2nd person.
The whole "get a pallet of ammo and a shotgun for the zombies" thing isn't helpful.
The whole "get a Katana and a Buck 110 for the looters" isn't helpful.
The general helpful nature of these threads is short lived, so the mods tend to watch them closely, and rightfully so. A lot of message board readers and posters get the wrong ideas from the people who parrot info just to look cool on fora, but don't really have any mud on their boots from actually being there.
I've been through a number of major weather related events that could and were called disasters, such as hurricanes. I do a lot of backpacking. I do a lot of bowhunting. I like the task of sharpening, but despise blades that dull quickly.
Having given that introduction, I would say that a good quality folder is a lifesaver, literally, when you're in a tough spot during a disaster of any kind. Knowing how to sharpen it, well, that's about as important.
I have a Buck 119 and several inexpensive 440 stainless folders in my stash. I keep a tiny little folder in my pack because I live in a deciduous forest that allows for lots of deadfall and low hanging black, jack, and white pine limbs that can be broken over the knee, so there's not much need for a knife that splits firewood.
I also keep razor blades (10) in my pack for medical needs.
I keep a folder in my 72 hour bag. purpose: food prep and shelter making
I keep the Buck 119 in my hunting pack. purpose: butchering in the backcountry
I keep a folder in my hydration pack. purpose: food prep and shelter making
I carry a folder in my back pocket most days because my hands are so big it makes keeping one in my front pockets a pain, and my pocket inaccessible for my hand. I have no interest in using a knife in SD situations. I carry a 357 and I practice AiKiDo, so it's either bang or blend.
I have been intrigued by designs like the Parang and Kukri, but have yet to be able to come up with enough reasons to buy one or more.
I'm also a convert to the legion of cane carriers and generally have a walking stick with me if I'm out and about during any kind of disaster or outdoors activity.
YMMV