My quick glance impression was that the author seems to dismiss renewables based on their low fraction of total energy use (including direct use that doesn't go

My quick glance impression was that the author seems to dismiss renewables based on their low fraction of total energy use (including direct use that doesn't go through electricity as an intermediate step when served by fossils, e.g. transport, metallurgy and so on) but ignores that nuclear has never substituted those energy use case either (ignoring a few aircraft carriers and subs) Yes, a future with enough renewables to also substitute direct fossil use is quite hard to imagine. But a future with that much nuclear would be no less crazy.