Well, Boxcar, I apologize for my assumption that you have never dived a long hose, but I still don't understand why you think that somebody would have any difficulty obtaining enough hose length to be able to breathe easily, if they pulled the reg from your mouth. Yes, if somebody approached you from behind and pulled the reg from your mouth from the left side, there might be a problem, but I don't see somebody approaching from behind and reaching around in front of you to extract the reg as something very likely.
No, I have not dived a stuffed and bungied long hose. I have read a lot of discussions about it, and it's pretty easy for me to see that it has some issues I don't see the need to deal with, because the basic long hose configuration works so well.
I can see where, if you used a 5' hose and it was too short, you would find a wrapped hose uncomfortable, but that isn't the fault of the configuration -- it's just a sizing problem. But how, even with too short a hose, you ended up having problems with donation, is hard for me to see.
I'm really not trying to tell you that it's wrong that you do what you do. But bungieing and stuffing the long hose has some problems which have led to that approach being abandoned by almost all technical agencies and instructors, so I am not alone in feeling that it is both unnecessary and suboptimal.
And as far as my backup reg failing . . . It doesn't. But it doesn't in part BECAUSE it is bungied on a necklace, so it isn't trailing anywhere, dragging anywhere, or full of sand. It can't come loose from its holder and trail behind me and freeflow without me knowing it. AND I never, ever get in the water without having tested both regs for good function. I know a fair number of open water divers never test their octo regulators (I have seen this).
Anyway, what it comes down to is that there are a number of approaches to gear configuration, and each of us has to choose the one that makes sense and works for them. All I care about is to make sure the record is straight, and that problems which don't exist are not imputed to the gear configuration which I have decided is the best for me, and my buddies.