Curious, has anyone tried any kind of token / tag based server side rendering for Lit / Web Components in CF ?

I would like to know about the web components you are asking about?

Web components as in the HTML standards ones https://developer.mozilla.org/en-US/docs/Web/API/Web_components declarative shadow dom is still in progress, but say you want to render some kind of place holder before the JS is loaded ? Or bundle the JS based on the most commonly used components ? Some people suggest applying css to the web component tag.