What structural element is key to the global scaling success of items like tacos and hot dogs?
Answer
The vessel (bun, tortilla, or wrap).
The primary reason for the global scalability and high-volume success of foods like tacos, kebabs, and hot dogs lies not necessarily in a unique ingredient, but in the structural template they follow. This template centers around the vessel—be it the easily folded tortilla, the convenient bun, or the wrap—which acts as a transportable base. This structural adaptability allows vendors to integrate nearly any local protein or flavoring while preserving the essential portability required for high-volume street food sales.

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The Street Foods That Define Every Country - YouTube
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