> Energy is energy Even this isn't quite true, since it's not fungible, except in the narrow use-case of creating heat[1]. > Whether the energy is carried by

> Energy is energy Even this isn't quite true, since it's not fungible, except in the narrow use-case of creating heat[1]. > Whether the energy is carried by glucose/ATP or electric current is just an implementation detail. This implementation detail means that converting between these forms incurs a tremendous cost (in lost energy) and, perhaps more importantly, is nowhere near instantaneous. [1] Even the slightly broader use case of heating (e.g. increasing the temperature of a home) can be done with a heat pump, and those don't tend to run off of fungible energy.