My family and I recently completed this Costco 1000 piece jigsaw puzzle made by Dowdle Folk Art(1). And I have to say, I had a very similar feeling to what the author of this piece is describing. Lots of different people, all walks of life, and no words requiring a dictionary! (looking at you, "Contrapuntal")
(1)https://boardwalkpuzzles.com/products/costco-treasure-hunt-1...