Ever since I was a little baby
I always be dribblin' I wanted to be an airline pilot. (Later in life I became interested in science and eventually ended up as an evilutionary biologist/microbiologist.) Some of my fondest memories as a kid were going to the airport with my parents to meet incoming relatives. (Surprisingly, I was an only child and spoiled rotten, they always had a bunch of swag for me right off the plane.) This was back in the 70s and 80s when anyone--ticketed passenger or not--could enter the sterile area and look at the planes. We always got there early (HELL A X) and I would spend hours with my nose pressed up against the glass looking at all the planes. The bigger they were, the more fascinated I was. While other kids in school were interested in fighter jets, I was always more excited by the airliners, especially the 747! As a little kid, I thought the men (sorry, in those days it was always men) who flew these monsters were gods and I wanted to be one of them. In those days, there was still a glimmer of glamour left in commercial avaition, and at least some people dressed nicely for the occasion. Paint schemes were far more colorful and vivid than today and stewardesses were pretty. Airlines like Pacific Southwest (my first flight on a DC-9-30) and Southwest were really a blast to fly. Economy class was not too bad, there was no TSA, and there were 747s everwhere at the major airports.
Today the 747s are just about extinct for hauling human cargo--British Airways, JAL, and a few others fly them, but they are certainly on their way out. A similar fate is awaiting the far younger Airbus A380--also a four-engined monster. Cost drives everything of course, and it is just cheaper to fly twin-engined 777s, 787s, and A350s that carry nearly as many passengers instead. Nevertheless, one of my acquaintences flies the 747 for UPS and he said that despite the achievements made by the latest generation of twinjets, there is no other jet that can fly as far, as fast with a full load of passengers, cargo, and fuel as the 747! The twinjets always entail significantly more compromises--at least in a fully cargo application. Indeed UPS just ordered several more of the latest iteration, the 747-800.
While Concorde was far faster, more glamorous and beautiful, it was a commercial flop and had a negligible impact on jet travel overall. Fifty years after the 747 was introduced, we are still flying at the same speeds we were in the 60s, except that the 747 is still among the fastest. (My ATC friend always complains about the Airbus 340 and how slowly it climbs out and flies--He calls their once-a-day Lufthansa A340 'the daily pig'). The 747 has played a generally unappreciated role in democratizing air travel and some authors point out that it has also played a significant role in shaping the history and geopolitics of our modern world.
I have flown on British Airways, United, and Lufthansa examples over the years, and while the 767 and Airbus 340 are both more comfortable in cattle class, it was nevertheless always a thrill to ride in one. I will miss seeing them in their passenger guise, but will enjoy at least seeing them in their freight-hauler role.
Article with some very cool images here:
https://www.bloomberg.com/news/features/2018-09-28/boeing-747-celebrates-50th-birthday-a-history-in-pictures