Li-ion has made tremendous advances in that time. This article[0] goes through some of the history. Some hot takes: - Price per cell has dropped ~97% since 19

Li-ion has made tremendous advances in that time. This article[0] goes through some of the history. Some hot takes: - Price per cell has dropped ~97% since 1991 - 1991 energy density ~200 Wh/liter; 2005 energy density ~500 Wh/liter; 2017 ~700 Wh/liter [0]: https://pubs.rsc.org/en/content/articlelanding/2021/ee/d0ee02681f https://pubs.rsc.org/en/content/articlelanding/2021/ee/d0ee0...