I don't think we are at a point where adding this syntactic sugar would improve things noticeably. The `entryComponents` are no longer a thing, so that improves the situation a bit.

Also, we would need to keep the existing APIs, because there are cases where you want more configurability. As a result, we would be introducing multiple ways to achieve the same thing, which is undesirable.

Based on the above (and the relatively low number of upvotes), I am going to close it. In the future, once the `@angular/elements` APIs are more refined and stabilized, we can look into ways to streamline the syntax.