Slot machines used to be massive, sometimes over 40 inches wide and built like...

https://paxtonsexpertop-ed.zenbloomer.com/posts/what-parts-are-inside-a-traditional-slot-machine-cabinet

Slot machines used to be massive, sometimes over 40 inches wide and built like mini walls on the casino floor. Now, you can play those same games on phone screens just 6-7 inches across