I think this is a worthwhile exercise but the years make no sense at all. CSS was proposed in 1994, not 2015. It's off by literally 2 decades. Also XHTML was re

I think this is a worthwhile exercise but the years make no sense at all. CSS was proposed in 1994, not 2015. It's off by literally 2 decades. Also XHTML was released in 2000... By 2010 it was almost obsolete with HTML5 coming out 4 years later I stopped reading there