MikeFerrara once bubbled...
Actually I think the official answer is that GI clips them where ever he can...hip, stage bottle or where ever. Last I heard he doesn't even have a butt ring. At least that's what I heard.
Yes, the lastest is that you can just clip it to the stage. The idea is that if you jump in with a reel you'll probably use it pretty quick anyway.
I have no problem reaching the butt D-ring so that is where I clip my reel, especially since I may not use it if the viz is good.
Technical divers used to do many things that are now considered dangerous by most. Deep Air is one example, suicide clips is another. The reason people don't use these methods anymore is because the have proven to be dangerous.
In a way, DIR is a refinement of this pattern. A method of diving is hammered out that eliminates all of the potentially dangerous practices, and promotes the ones that are proven safe.
Of course the system evolves. However, it evolves very slowly.
This is a good thing, IMO, because so far it has proven very safe and reliable. This is also why I dive DIR.
Enough people dive this system to ensure that every aspect of it is tested repeatedly. That's part of the reason it's so reliable, and it's also the reason why it's so rigid. If everyone changed a little thing, then the whole reliability of it would go out the window.
I'm not saying that non-DIR diving is inherently more dangerous. It may be, or it may not be, depending on your setup. I'm just not interested in finding out the hard way.