My point is that this is happening right now, and even though the cases where the economics work right now are limited, the price trajectory still favours this scenario. The IRP, and Eskom's strategic planning, should be making best guesses about the future, not assuming that the status quo on technology and economics will persist into the future, which is the point that the authors are trying to make. Domestic users only make up about 20% of Eskom's output, so if all businesses that operate during the day defect, or self-generate the majority of their requirement, Eskom's finances will still be kaput!