Even at only v1, along with the "don't break the web" mentality, Web Components are an extremely important stepping stone. We should cheer the implementers of these proposal on and help!

We can now render whatever content we want confidently, inside of other apps. Less than an iframe, but enough isolation (or not if you want) with all of the important benefits of being baked into the current document.

Example: https://kherrick.github.io/block-garden/

Same custom element running inside Angular: https://kherrick.github.io/apps/playground/block-garden