An E with a .80 on a 30" scale bass is nowhere near as ridiculously low tension as a 34" low A with a .100. Yes, that .80 E is going to have lower tension, but nowhere near the unplayable tension of the .100 low A. I tried it earlier today when he first mention it. It's unplayable.
No no no, you're not paying attention! Tobin Abasi is a guitarist, and his instrument is at a 27" scale. Every instrument is different, and so is every player. I know a luthier that has a customer that asks him to set up basses so low that a credit card at the 12th fret is a tight fit. To the luthier, this request seemed ridiculous because Science and because fret buzz. But this bassist had a touch and when he played it was like butter.
Assuming does not always make an ass out of both parties