[octalmage]

I've been using Rails and React for a couple of projects, one using Rails API mode with a separate React front end, and one using react-rails. I'd argue that with webpacker built in, there's no reason not to use React. You get server side rendering built in, automatic production builds and hot reloading. It's a great Dev experience out of the box with no setup.

Of course this depends on your frontend and your goals. If you're just going to have a minimal static frontend, then maybe React isn't a great choice. Although I'd still use React and just render it to static HTML at build time.