All these abstractions over CSS seem way to complicated and many way to far from the browser to me. With Shadow DOM style scoping, CSS custom properties and @a

All these abstractions over CSS seem way to complicated and many way to far from the browser to me. With Shadow DOM style scoping, CSS custom properties and @apply mixins all coming very soon, most of the problems of composable, reusable styling, and even theming, will have great native solutions. I'd like to see more focus on reusable polyfills than trying to divert around CSS. Polymer supports all three of those now, but they're pretty tightly integrated so other frameworks can't use them so easily yet.