I wanted a guide that focused on the one thing all web developers have in common - the page construction process in the browser. We all use different servers, languages, etc.
HTTP2 will absolutely change a lot of how this works, you're right. I chose not to cover it as it won't be a real option for most developers until nginx supports it (still in alpha). The skills I'm teaching in the article re: the Timeline can still be applied when HTTP2 gains mass adoption, so you can test for yourself whether or not the recommendations in the article still make sense.
HTTP2 will absolutely change a lot of how this works, you're right. I chose not to cover it as it won't be a real option for most developers until nginx supports it (still in alpha). The skills I'm teaching in the article re: the Timeline can still be applied when HTTP2 gains mass adoption, so you can test for yourself whether or not the recommendations in the article still make sense.