DevonDiver
N/A
The other thing to mention is that unclipping a reg shouldn't require "futzing"....it should be trained better than that. If it's not, you have a training issue...that UTD is solving with equipment. If you haven't practiced unclipping your reg enough, then the $.02 o-ring or $.002 ziptie are an easy way of surviving the realization that you were trained poorly.
True, if "futzing" means general equipment unfamiliarity. Bolt-snaps can get jammed though, or silted etc - especially if tight penetration is done. I consider a break-away to be important for safe sidemount.
That said, I can employ my wrist-mounted Eezycut pretty quickly...and do train for that. Anyone who uses cut-aways should... especially on long-hose.