Same reason you might use Polymer instead of raw web components: Polymer adds nice polyfills, binders and observers and overall nice helpers to make handling we

Same reason you might use Polymer instead of raw web components: Polymer adds nice polyfills, binders and observers and overall nice helpers to make handling web components much easier than the raw standard. I tried using straight web components with the polyfills; it gets kinda messy compared to something more polished as Polymer. I assume it's the same deal with Aurelia.