What gets me is the way things have been set up. When I learned to dive, virtually everything was covered in training that is now divided up into little packages, each with its own card. When I finally went for my first C-card, after eleven years of diving in all kinds of conditions, I was given a Basic SCUBA card from PADI. At that time, that card meant a lot. It meant that I had experience in buddy breathing from depth, emergency ascents, deep dives (to 130 feet, my personal limit because I get narked easy), emergency and rescue procedures, you name it. That card came with no more restrictions to its use than I chose to place upon it myself.
Then, sometime in the '80s, I lost the original card and sent off to PADI for a replacement. To my dismay, my new card was marked "Alternate Air Source Required." Until that time, I was not even aware of the (to me) new practice of hooking another second stage to a regulator for emergency use. By 1992, my Basic C-card had become even more restricted, so I went through the motions to get my OW just to keep down the hassle.
Now, I find that if I want to dive below 60 ft. from a charter boat or other "official" dive operation, I will need an AOW. And this just to do what I was trained to do years before I even got my first C-card.
If the agencies want to compartmentalize their training of new divers, fine. But why penalize us old geezers by changing the "value" of our once meaningful certifications?
I'll get off my soap box now.