Having React on a static blog makes it easier to share component libraries that you've built up on other projects (perhaps SPAs) with said static blog.
It also allows the use of React's ecosystem, such as react-helmet[0], which makes it easier to change the meta tags and title on the page when rendering.
It also allows the use of React's ecosystem, such as react-helmet[0], which makes it easier to change the meta tags and title on the page when rendering.
[0]: https://github.com/nfl/react-helmet