Cards, roulette wheels, and slot reels carry casino history in their materials...

https://varimail.com/articles/why-reels-became-the-default-way-to-show-slot-outcomes/

Cards, roulette wheels, and slot reels carry casino history in their materials and mechanics. A closer look at single-zero versus double-zero roulette shows how one small design choice changed the odds and shaped the experience of play.