Good news! Many of these very problems are being worked on right now. The component issue you raised is being fixed with web components: http://www.html5rocks.c

Good news! Many of these very problems are being worked on right now. The component issue you raised is being fixed with web components: http://www.html5rocks.com/en/tutorials/webcomponents/shadowdom/ http://www.html5rocks.com/en/tutorials/webcomponents/shadowd... which should be making its way into stable browsers in a matter of months. The module system is being fixed by ES6 modules which should be appearing in Firefox and Chrome within the year. I haven't heard anything about namespaced CSS and I agree that's something that we need.