Unpopular Opinion - Pub subs blow. I mean if you like hard thick bread that nearly cuts the roof of your mouth then sure they’re great. I prefer a softer bread for my sub. Man I feel better having said that!I don't think anyone older than a millennial/younger Gen X intrinsically knows what a pub sub is.
edit: It's not even necessarily an age thing. If you're shopping from like Whole Foods, you're not part of the pub sub culture.