Yes, but now you're requiring that developers go through the work of porting every single third party web component they might want to use in their project. Tha

Yes, but now you're requiring that developers go through the work of porting every single third party web component they might want to use in their project. That's the current pain we're all going through today with Angular, React, Ember, etc, which are basically glorified web component polyfills when it comes down to it. The whole point of Web Components is portability.