What is this?

but there's no reason you can't pile a shirt-ton of Italian meats on French bread and call it a po'boy.
I totes agree but I don't think anyone down here does such a thing. They'd never make a go at it. Instead we have the aforemaligned Jimmy John's and the Subways and Jersey Mike's Subs and Firehouse Subs and Quiznos (which barely exist anywhere anymore) all trying to imitate what I love about my submarine sammiches from the north. All of those exist north of the Mason-Dixon, of course, but everyone up there has their favorite local sub shop that they keep in business.

I think it's analogous to how people down here, if I understand correctly. all kinda have their favorite local muffaletta place.