"Old" works for me
As long as I'm on a plane I sort of like the idea of a tried and tested system controlling the airspace I'm in. New is only good if it offers extra functionality that is absolutely necessary. I'm going to suggest that the actual requirements for an air traffic control system don't change much (assuming there is spare capacity within the system). I'm also going to suggest that there seem to have been very few (if any?) fatal accidents caused by air traffic control problems in the UK (I don't know how many buttock-clenching near-misses have happened).
Biting the hand that feeds IT
