Ask HN: JavaScript framework that I can use “right now”?

After spending a week learning and experimenting "modern" JavaScript I think it's not worth the effort to use React.js and Webpack if I'm not making a full SPA. It's like alpha software with constant changes (I'm mainly talking about the ecosystem and its components). Documentation is also lacking, specially Webpack. Even tutorials from 3~6 months ago are somewhat outdated. Funny thing I learned Flux's basics and now they are already talking about Relay (ffs!) Right now I have a tradicional (and huge) MVC back-end and an API (I'm not using Node.js). Assets = Gulp to concat+rev+uglify. What would be the best approach to my pages where a lot of user interaction is needed? Using jQuery and handlebars seems ugly but I think I'll be overcomplicating things if I adopt an entire new stack (React, Babel JSX/ES6, Webpack, modules, hot-reload...) on top of what I already have. I'm the single developer on this web app, I feel extremely produc