Not sure it was a fad but it certainly was a waste of money. I bought a fold up stainless steel wood burning cook stove about 40 years ago. You were suppose to be able to burn small sticks of wood in it from around your camp site. I used it once, smoked bad made a mess of it's self and the pan, with no easy way to clean it on a camping trip. Still have it, neat concept just didn't work, couldn't bring myself to throw it away.
Now they do part of it right, the Solo Stove, a gasifier wood burner, that actually works. Doesn't fold up but after a couple of minutes of burning it burns clean and very little left after the fire goes out to throw away, cleans up with a rag or paper towel. We have the small one and use it as mini wood fire that you can actually sit next to and doesn't burn a cord of wood on a week long camping trip. I cut up wood scraps into small pieces and a 5 gallon bucket full will gives 3 or 4 fires. If I supplement with sticks from where we are camping I can stretch the number of fires.
I probably have others, I'll have to think about it.