Earlier quoted context omitted.
> the original fast food was hot dogs and that's almost entirely gone now. Curious about this history. According to Wikipedia, fast food was common during antiquity, while the hotdog wasn't invented until the 1400s. White Castle seems to be recognized as the origin of modern day fast food and it opened as a hamburger joint.
Fair enough, maybe not the originallest, but some of the now hamburger chains started out as hot dog chains, of which there's one? left IIRC. https://en.wikipedia.org/wiki/Carl%27s_Jr.#History https://en.wikipedia.org/wiki/Hot_dog
According to research from the University of Guelph, hotdogs are comparatively uncommon in fast food because hotdogs are harder to cook consistently and have a shorter window of enjoyability which makes them less suited to fast food than hamburgers.