What are some alternatives?
When comparing Polymer and Inferno, you can also consider the following products
Vue.js - Reactive Components for Modern Web Interfaces
Riot.js - Riot allows teams to communicate across a wide range of collaboration apps.
AngularJS - AngularJS lets you extend HTML vocabulary for your application. The resulting environment is extraordinarily expressive, readable, and quick to develop.
Aurelia - Next gen JS framework written with ES6 and ES7. Integrates with Web Components. No external dependencies except polyfills.