Agreed, the term "inventor" in the headline makes it seem unnecessarily naive. But even if it's art, I suspect that some objective benchmark comparison fits ve

Agreed, the term "inventor" in the headline makes it seem unnecessarily naive. But even if it's art, I suspect that some objective benchmark comparison fits very well: assuming that you had serfs to do the dirty work for you, at eight man-hours for 20 km this would be clearly more efficient than having them carry you around in a sedan. And only slightly less efficient than a rickshaw. Great way to put our fossil every consumption into perspective!