You're wrong about web components and react. As of 0.12, if you register a web component like you normally would, you can reference it in a react component. React no longer has a white list, and instead assumes all lower case tags are HTML tags (standard or custom).

The only drawback is that it doesn't support custom events out of the box. Instead, you have to manually create event listeners on elements on mount. As far as I can tell, there's no reason why it couldn't in the future though; Web component adoption is so low right now that it just hasn't been something people have complained about.