Most biodiesel depends on the availabilty of sodium methoxide to trans-esterify the vegetable oils. You still need petroleum and you still need caustic. Caustic requires electric power to manufacture and you have the small matter of all the chlorine made a co-product.
There still ain't no free lunch.
No argument. But at least it's useable now, and I think it's still a better option than gasohol efficiency-wise.
Ideally we'd be letting the market make the call. It will, anyway.