Tradition isn't always traditional

Working on Halloween Night for the Storytellers Vault has reminded me that when I was a kid we had turnip lanterns instead of pumpkins. I can entirely understand why we adopted the American development here, because pumpkins are big and carving-friendly and turnips are too small for anything bigger than a tea light and slightly easier to carve than oak.

Compare.

Similarly, NFL player Colin Kaepernick, and many others, kneeling during the American National Anthem is supposedly attacking a tradition... but they’ve only played it before NFL games since 2009.

I rarely see this kind of detail in worldbuilding. My favourite example (forgive me if you’ve heard it before) is in one of the Trinity setting/Order books where it’s established that mood-sensing jewelry which really works exists... and has been out of fashion for a few years.