Over the last couple of years I've been building some pretty insane street bikes with world superbike parts. In my journey I learn a few things about the difference between building one bike and being a race team with several of them. The difference is just as wide in the professional simulation market. The company's manufacturing these systems aren't using "special" hardware, they are just using the best of everything and they have the money to keep extras of everything, including extra full systems.
I know a few people with full size 42u racks at home, but none of us have them filled. When you are building computers that control spy drones this is how you roll.
Our sponsor for this trip had several systems at booths from companies like Lockheed Martin, maker of the F-35 Multirole Fighter. Most of the AVADirect computers were tucked away in the simulators themselves so we weren't able to photograph them. In this industry AVADirect is said to be a superstar with several companies commenting that the systems are built to higher standards then what's offered by the competition.