I think a far more important aspect of the meal is the quality of the food than whether or not the food is delivered to you on a plate.
Well this is why for me all it is "is a fancy BK" if they served it on a plate and delivered it to the table then I think it would be worthy of a visit.
It was a genuinely horrible experience when I went to 5 guys. Rammed with people, took a while to order. Then had to stand around waiting for it to be made. Then had to grab napkins, etc. Then I walked about looking for a table on the ground floor, then on the first floor then back to the ground floor to sit and eat awkwardly on a barstool with people right on top of me either side.
After that I didn't really care how good the burger was tbh. To be charged £15 for that kind of experience I'd honestly rather go to BK if I fancy a burger, however nando's is my go to for a chain and spending around £15 a head.
I was also amazed at the number of kids (under 16) in the place, full of them. When I was that age out with my mates in town I'd usually grab a greggs for £2.