There are also people who are into performance but the circumstances won't allow it.
I used to ski a bit but usually 1-2 wks per yr and I have to travel far for the fun. I would love to improve but did/do not have the time and money.
For a vacation diver who done eg. less than 20 dives a yr, performance is the less concern. They want fun.
Perhaps one day when PADI introduce a OW course based solely on BP/W. Then the industry might stand up and take notice.
And why is a BP/W not fun? For me it was a lot more fun! Better adjusted, more balanced, what a difference to have a clear chest... this can be seen as improving performance, but will also make the dive more enjoyable! And the better trim also helps with the swimming and air consumption, leading to... more fun.
There is no reason not to teach a PADI OW course in BP/W and I know shops doing it.
---------- Post added February 21st, 2015 at 09:11 PM ----------
As I start purchasing my first set of equipment I've been into 3-4 dive shops looking around. I'm not counting looking around on-line, of course. If the shops had bp/w rigs, they were hidden behind racks of jackets in most of the shops and no one brought up the subject.
I think many shops and instructors still see BP/W as something for more "advanced" divers. They don't mention it to new divers and expect divers who want it to be the ones asking.