I'll tell you about my experience. I was apprehensive about DIR being a 'use this equipment or else..' thing. I spoke with the people in the shop and agreed to do the course with an open mind. Brought in the equipment I had and we went over it all during the course. I tried my equipment vs standardised. We did skills and other things and I could see the logic behind the way things are set up, standardised and how this could help in emergency scenarios. What did not fit that mindset, I got rid off, what did, I kept. The philosophy fits!
While we on one hand need to keep an open mind on the fact that not everyone can just keep buying gear, we should also keep an open mind on the fact that there is a lot that comes with uniform gear configurations and the reason why a specic piece of gear is there. It is not about gear. It is about a method that is supported by gear and configuration. Mind you I am not talking about brands, but about functionality. I gave the instructor a hard time,'proving' to me why this is this way and that is that way. Never did I hear anything close to ' because it is DIR'. I think this one of the reasons (I am just guessing here) why there seems to be a move away from 'Doing it Right'. Maybe it should be called DIOOW (Doing it one other way)
in the end we all want the same thing: dive and enjoy it. If we can do this in a safe way, then hey everyone is happy.