How do! :D

With the recent end of production for the Boeing 747, and the demise of the Airbus A380 in 2021, I'd like to look back at the legacy of a type of commercial airliner which was once the very staple of international travel, the fourengined jet airliner or Quadjet, a configuration born from necessity during the infancy of aviation, but now, with the advancements of technology, is facing a protracted demise as fuel efficiency and environmental considerations become order of the day.

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References:
Wikipedia (and its respective references)