You're right about the converted dedicated cabs, but again, it´s USA, and dedicated cabs are just as common as generic ones here, better he use them that they end in the gutter..
Also, he said that the ones that didn't work, was not powered on, of course there was some non workers, but come on, with 300+ cabinets, 1 or 2 breaks down every day, especially because they run all day....
Just my 2 cents