I hear you. I think Shadow DOM is very useful for a handful of roots on your page, encapsulating third-party widgets or DOM-heavy components like a nested navig

I hear you. I think Shadow DOM is very useful for a handful of roots on your page, encapsulating third-party widgets or DOM-heavy components like a nested navigation. Custom Elements on the other hand are useful for attaching behavior to HTML, sort of like jQuery plugins. Not at all sold on the frameworks promoting using Shadow DOM for every button or whatnot.