Wikipedia claims it was coined as recently as 2003: https://en.m.wikipedia.org/wiki/Progressive_enhancement#History https://en.m.wikipedia.org/wiki/Progressive

Wikipedia claims it was coined as recently as 2003: https://en.m.wikipedia.org/wiki/Progressive_enhancement#History https://en.m.wikipedia.org/wiki/Progressive_enhancement#Hist... Sounds fairly recent to me (so long after first versions of CSS and js) - but also not entirely unreasonable. 2015 is certainly much too recent.