In a web app I'm working on, we're planning to move the front-end to ReactJS. I'm contemplating whether it'd be better to build it as a SPA (single-page app), where the server just exposes a RESTful API for the frontend to use, or a multi-page app, where the server renders parts of each page that don't need interaction, and we use React for the interactive parts.

What factors would you look into to make a decision like this?