Slot machines used to fill casino floors with massive 50-foot banked setups,...

https://lunasuniqueinsight.inkharbory.com/posts/the-simplest-timeline-of-slot-machine-evolution

Slot machines used to fill casino floors with massive 50-foot banked setups, packed into cabinets over 40 inches tall. Today, those same games fit neatly on a 6-inch phone screen, offering the same reels and bonuses in your pocket