Thank you for clarifying that your "3 hour dive" includes mandatory decompression stops of about an hour "which is nothing because you sleep". So your 3 hours becomes 2 hours of diving plus 1 hour "sleeping on the line" vs my 1.5 hours of no stop diving separated by an hour in the sun. Do you really fall asleep on the line like you said or is that sarcasm? Because if you fall asleep you can easily not wake up and DROWN.
I'd rather hang on a sunny dive boat with my buddies for an hour than sleep on a line in the middle of the ocean.
Nothing else in your response merits further comment. There isn't really all that much to gain using technical scuba gear on a dive like the SG, at least not for the reasons you provide in your post and in your response to mine, other than your questionable statement that you don't get cold after spending up to 4 HOURS at depth in water temperatures that on the SG average in the high 70s.
It's about 30 minutes of deco on CCR considering multilevel diving. I've done this more than a dozen times. 2.5hours of bottom time vs 30 minutes (x2) or less for most.