From what I can tell it's active only in that it changes ride height, not actually adjusting the suspension through a corner so the timing is not critical at al

From what I can tell it's active only in that it changes ride height, not actually adjusting the suspension through a corner so the timing is not critical at all. You don't need anything approaching realtime for controlling an air-based suspension. If we were talking about the magneto-hydraulic suspensions that adjust constantly to road conditions like potholes and corners, then I would agree 100%. But the response rate of the pneumatic system will be far slower than the computer.