The worry is real. You cannot find a decent mission burrito afield. It really a local specialty of San Francisco. I suspect the same is true for burritos found in San Diego. And those tacos in Texas, on flour tortillas, well those aren’t tacos at all but incomplete and unfinished burritos. OK if you want to rebrand a half assed burrito and call it a taco go right ahead. And none of it is a sandwich - not burgers, dogs, falafel, shawarma, gyros, burritos or tacos. A taco is not a sandwich