Well I liked Analog's historical explanation. I think origins are fascinating. So there.
I did too. I was just ribbing him because of his sig line. That's why I stuck my tongue out at him, yet again.
I think it may be too late to change the mg/ml standard. There's so many juice vendors out there using it, that it would be nearly impossible to impose any other standard now. As long as I know in relative terms what I'm getting, I don't really care either way, but I think the train has left the station on this one.