Back in the 80s and 90s, US airlines routinely flew domestic wide bodies on shorter routes, like 747/DC10/777 between Chicago and Miami or L1011/767 between ATL and BOS. Delta flew 767s DTW-ATL right up to 9/11, and 767/777 ATL to almost every city in Florida through the 2000s. I guess what's old is new again. "The Points Guy" may be too young to remember this.