and each time it breathes so smoothly I don't think about it.
That is really the goal, the scuba equipment should be as transparent to our dive experience as possible and augment our exploration of the undersea world. Some of us, like I could be one of them , sometimes I think dive just so we can use our fancy equipment and the dive becomes about the equipment and not the experience or the exploration.
Occasionally something happens though and it moves us past a point where we had existed previously comfortably. And without going in to it, that happned to me. And now my number one priority in scuba equipment is reliability, simplicity, functionality and serviceability. And to be, again, as transparent to my experience as possible. If it is pretty and cool and the new hotness, all the better, well, I am a regulator geek .