I think adding a bit (or a new article) about why someone should choose this approach for state mangaement over existing alternatives would make a stronger argu

I think adding a bit (or a new article) about why someone should choose this approach for state mangaement over existing alternatives would make a stronger argument. Perhaps clarify the connectedCallback() and customElements.define() methods are not arbitrary, but specific to the API (I know the API is linked to in the article, but readers are lazy). (Better examples here than in the previous article, thank you!)