Yeah, I wrote about it last week:

https://medium.com/@alexkrolick/writing-react-components-for...

"Overall it's not a bad experience. JSX makes HTML feel more at home, but tends to obscure the underlying Javascript. Composition and higher-order components are more obvious in plain JS. If I was writing a library using those patterns heavily I might be tempted to go JSX-free even if bundling with Webpack + Babel."