I recently stumbled across "shoelace", which at a glance seems like an example of what the article is hoping for. It's a thoughtfully designed library of UI web components.
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One of the benefits of Stencil is that it can generate Angular, React, and Vue-specific bindings. This smooths over any issues React has in working with WC's and provides a first-class React experience.
Stencil was built to power Ionic Framework which is arguably one of the most popular web component UI libraries. Fun fact: there are many thousands of app store apps built with web components! (data: https://appfigures.com/top-sdks/development/apps). This underscores a fact about WCs: their proliferation is largely happening behind the scenes and unnoticed by many in the web world.