The author seems concerned about creating custom elements for everything a site might need but isn't that what we all want - composability? It's the reason why libraries like React.js and Riot.js are so popular. Breaking everything down into components is highly desirable, and if they're portable like web components are then it's even better.
I think the reason React is so popular is due to the developer experience. It's a simpler mental model where you no longer have to worry about your previous state and how to transition the view to the correct current state based on it.
