Oh, I used one of those in a parking garage in Toledo, late 70’s. Fun, if you’re careful...up four, down four. Don’t drop yer beer!
The cages are a safety feature, corporate safety from injury claims. If the diagram is accurate, I guarantee some nitwit will find a way to tear off an head or leg with that robot arm.
Most likel the units will be non functional most of the time. They have more disabling sensors than a space shuttle, and take as long to get serviced.
Ever see three monkeys try to hump a football...? Watch three freight kids try to figure out that a sensor has a gum wrapper stuck in it.