The magic carpets were, according to the guys I talked to, apparently a maintenance hog, and WS
had no-one qualified to fix them. Getting someone from DL
to hang out in the event they fixed would probably have been prohibitively expensive.
I used one several times before, and they can also be hard on bags if used carelessly. They can suck up one of those folding suit-bags, never to be seen again. That's nasty to see, and even more of a headache to tear some poor sucker's bag out of the system..... now, telescoping pits - different concept, same end goal..... like those in the old QN
757 - were awesome.