Chekhov’s Gun and Worldbuilding

Edit: Another great example of world-building I love that isn’t traditional exposition: the gold coins in John Wick. It’s never explained exactly what the system is, but we’re introduced to the coins when Wick uncovers his gear, and we see them used at the hotel and other places throughout the movie. Even though we’re never told the intricacies of the coin system, the coins are introduced and given a purpose, and just that simple little bit makes the world of John Wick so much more interesting and alive.

It’s less about knowing the entirety of the system, and just knowing that there is a system at all.