If PADI had decided NOT to provide a Nitrox cert, do you think we'd have it so available and often free the way we do now?
Yes, I do. Somebody else would have filled the void and ran with it. Dive operators saw the benefit of Nitrox to their operations and screamed at PADI. If PADI didn't wake up then, the operators would have changed agencies and PADI would have lost the market. PADI has NO credit in this department at all.