"The first Nuclear bombs were very big also. These things will be adjusted in time. Don't throw the baby out with the bath water. In Columbus' day, they thought the world was flat."
Yes, but that's because they had not yet reached peak efficiency.
My acquaintances calculation was based on peak efficiency in extracting the amount of O2 dissolved in water.
I'm more of the kind that go on hope, chance, luck, and dreams. Your kind usually win. (smiling)