This seems like a special case of the general concept that matching electricity demand to supply is important, and whereas a fossil fueled grid has enough dispa

This seems like a special case of the general concept that matching electricity demand to supply is important, and whereas a fossil fueled grid has enough dispatchable power sources to match supply to demand, a renewable-powered grid has to instead match demand to supply (at least to a much greater degree). So it's interesting, although at some point it seems unnecessary to enumerate that this same concept applies to every possible source of electricity demand.