A bunch of work since 2013 has been in filling out the foundations of the web platform, so that as many new features as possible can be added by web devs first,

A bunch of work since 2013 has been in filling out the foundations of the web platform, so that as many new features as possible can be added by web devs first, and standards committees afterwards if necessary. This initiative is called the extensible web: https://www.w3.org/community/nextweb/2013/06/11/the-extensible-web-manifesto/ https://www.w3.org/community/nextweb/2013/06/11/the-extensib... So there's been a bunch of work on Custom Elements, Shadow DOM, ES6 modules, HTML Imports, ES6 proxies, Custom style & layout & paint (this part is still pretty early), etc