Used this recently for a client's static site. In our case, we had an existing React codebase for the app part of the site, so using React for the static site

Used this recently for a client's static site. In our case, we had an existing React codebase for the app part of the site, so using React for the static site gave us a consistent way to get composition of components and also allowed us to reuse a header widget from the app on the static site in a very clean way. One thing I wish was easier was disabling the whole react-router part and just outputting standalone pages.