I bet not many survivalists and backpackers don't have a pumped white gas or butane camp stove.
But who has a survivalist wood camp stove?
Like this one:
I like to have one on hand for a backup or for when the standard stove fuel runs out.
It's a little heavy, can be a pain when dry twigs are not available, would be a pain to clean and, overall, not a very quick stove.
But good to have in the quiver. It can almost always be made to work, when nothing else will.
I'm playing around with mine on the back sidewalk, experimenting with fire starters and fuel. I will try some charcoal - maybe crushed up a little so it can be dropped in between the top cross members. I imagine that would be a good cooking fuel. I'll try it once and see how the metal holds up to such high, localized heat.