Great write-up Lee!
I think it’s important to keep in mind that, as mentioned by Rob Larsen in his book The Uncertain Web (2014) that a lot of these initial ideas ran into a lot of kickback from the community. A good example is an initial vision that was presented to the W3C in June 2004:
This idea was voted down (with 11 members voting against it and 8 voting for it). This, along with the crazy history of the web, is a sober reminder to keep an open mind, and hold off on knee jerk reactions to new developments (whether they be ReactJs or Atomic CSS), since we never know where the web might take us in 5 years. :)