First off, if you don't think there is any, please don't post here!
A lot of the time, I see people posting something about DIR and saying, "But I'm just a recreational diver, and these things don't apply to the diving I do." The implication is that DIR is only of significant value to the technical diver.
It got me to thinking, though. For which type of diver DOES the system offer the most value?
In the world of recreational diving, you have the most variation in gear and configurations, the most variable buddy behavior and communication techniques and skills, and great variability in skills. But the dives generally aren't high risk.
In the technical world, equipment is likely to be more similar, although there are still outliers. You're more likely to see a team ethic (except in New Jersey wreck divers, as I understand it
) and at least in caves, you're going to see a high standard of skills. But those are also the environments where the importance of rapid response to an emergency is so much higher.
So I think it's an interesting question: For which group is an approach involving standardized equipment, gases, skills and protocols going to offer the greatest increase in either comfort or safety?