I don’t like the proposed method but I’m glad to see thoughts a little outside the main lines of utility CSS vs Module isolation vs naming conventions like BEM.

One bad consequence of the custom element name convention is that the outer layer of a component then has no semantic meaning and accessibility has to be fully implemented by the developer, which requires a lot of knowledge and effort compared to using correct semantic HTML.

Inaccessible code is a real business risk and making all components generic elements with no affordances for screen readers would not help. It’s a pity the article doesn’t consider this at all as its recommended patterns would lead to some needlessly bad experiences.