And the irony is that the author of that talk spent that same decade busy shoving as much Javascript into browsers as possible. After all he's the originator and the main promoter of web components where every single thing including built-in browser functionality like form participation has to be done in Javascript.

Edit: There's not just one lost decade of the web. There's the browser wars and IE stagnant dominance. There's the 2010s with millions of man hours spent on web components and starving other directions of resources or actively hindering them (e.g. scoped css was continuously postoponed because it's highly incompatible with Shadow DOM) while pushing everything into Javascript (and partly breaking JS e.g. with the bolted-on class-based OOP).

It remains to see if Google's complete dominance breaks the web further