For example, and I know this is heresy in this forum, I choose to put my long hose on my octo. In an emergency, I don't want to have to take my primary out of my mouth. That's just one more step that could go wrong. If the distressed diver pulls it out of my mouth, I'll deal with it and just go to my octo. But I don't see a reason that I need to add another step in a crisis. Hopefully if I'm doing my job as a buddy, I'll see it coming and be ready to shove the octo into his/her mouth as I'm approached.
Many of the gear concepts are great along with the minimalist approach and the general philosophy of safety first and forement. These I buy into completely. I believe that an open ocean diver can learn a lot from DIR, but it takes a filter. If I were diving in overhead, I'd look at it differently.
Thanks again for the insights.
PS> I've driven nuclear submarines for a living so I understand the value of redundacy, safety and training.