It's not as interesting if you make them to be a drop-in as the main UI of a client. I tried to port Amethyst's components from a Phone to a Tablet and even that little difference made the ready-made components not that great to be used. It was easier to just redesign/recode them. I can only imagine how off it would look when you consider mouse vs touch UIs.

However, It could be interesting if it had a simpler goal. Users will mention an nevent inside a kind 1 note all the time. That nevent can be anything, any event type. Because of that, there is a strong need to render any event kind inside the kind1 note. And that could be a very powerful base UI library that devs would use before they develop their own custom components.