Thank-you. I enjoyed the story, and I have a little validation for you, too: trifolds absolutely qualify as foldies. Lowkey I think they're the backbone of grab-and-go TTRPG adventures. Some of my favourite games fit on a trifold.
Have you seen Citizen Sleeper: Spindlejack? https://jump-over-the-age.itch.io/citizen-sleeper-spindlejack Trifolds are very much alive and well!