The actual article this story is about:
https://www.pnas.org/content/118/12/e2018977118
(the link was there but buried at the bottom of the page)
36 karma · joined May 22, 2017
(the link was there but buried at the bottom of the page)
As long as there's no actual widespread fully working currency using only PoS, it's a bit like justifying the emissions from flying by pointing to experimental solar powered aircraft, and saying all flights will be solar powered any day now.