NAUI is still the best standard in teaching in the scuba industry. However, PADI has surpassed NAUI in the marketing side. Of course, more PADI shops (which used to be NAUI), the more PADI divers. Kudos to PADI, but more PADI dive shops has nothing to do with the NAUI standards of teaching. Dive shop owners switched from NAUI to PADI in the 90’s, because PADI offered more support in the marketing side. So, the massive exodus from NAUI to PADI began. Even so, NAUI has never slacked off from it’s teaching standard, which I consider, better than PADI. I’ve had many PADI instructor friends, who said, if they can do it all over again, from OW to Instructor, to start it over with NAUI. More so, more and more dive shops who used to be NAUI, then switched to PADI, are slowly going back to be NAUI. I wonder why?
Just my two cents.