Who disagrees with DIR and why?

[Mark Y]

That might be true. But that is like saying a greater percentage of race car drivers crash on race tracks versus average drivers on city streets. It comes with the territory.
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Jason, I think DiveCaptDean suggests that super certified folks, even though they are entering higher risk dives, have a higher survival rate than warm, rec divers???

Although we wander from the thread title, DiveCaptDean, how would you improve rebreathers to a point where you'd dive one? I'm certified on the Draeger Dolphin & the YBOD (Inspiration) and find them both to be fine machines. But then again, I be a stroke!