They are less prominent by location I suppose. A lot of it likely had to do with speed. Places like McDonald’s went with thin patties to compensate for speed. Krystals was one of the first chains, and they press 5 holes in each patty before they hit the grill. The smash burgers were just another way to cook them high and fast. I like them a lot but it’s something I rarely do at home because the odds of setting off the smoke alarm is high. And that’s annoying as all hell. Flat tops on outdoor grills are becoming more of a thing from what I’ve heard, which may be lending to more people making them at home. I’ve heard several people talking about Blackstones or what not. The American family was known to make burgers on a grill from most films, which you couldn’t really make smash burgers like that with grates