Without question, ABV weights can be quite deceiving. So much lighter obviously. I recently cooked up 30 grams into coconut oil. It was a PILE, filled up a whole big tub pre-cooking. It must have been several months worth, a good few ounces.
The weight reduction of unvaped to ABV will be very variable too between different users, vapes, loads etc.
I think it would be quite interesting on top, if we could somehow monitor both our ABV weight, and pre-vaping weight as well, to see how much actual weight is lost, across the board, and how it varies so much between different people and approaches to vaporizing.
My ABV must have been about 3 to 4 ounces worth originally. The edibles turned out well anyway.