Broadband is a relatively new technology, and its underlying science is still being developed. We have long understood the 'right' units in other engineering disciplines: mass, length, hardness, etc. What is the 'right' unit for supply and demand for broadband?
This presentation discusses the need for having the right metric. This means solving two problems: the 'abstraction' gap, and the 'inference' gap. ∆Q is the ideal metric because it fills both gaps.