Re: [webcomponents] Need to update CSS Scoping for closed shadow tree (#293)

You had 3 points (below is my understanding):

1. we should mention behavior for closed shadow tree for `/deep/` and `::shadow` if we decide to keep them in the static profile.
1. nothing to be done for css-scoping spec's "Shadow Cascading & Inheritance" section about closed mode
1. `::slotted` can take only simple selector

For 1, it might still be relevant, but for CSS Selectors spec? https://drafts.csswg.org/selectors/
For 2, if nothing to be done, it is irrelevant
For 3, as you mentioned in the previous comment, open or closed is irrelevant.

Then what is keeping this issue open?
Anyway, cascading order does not change anything whether the shadow tree is open or closed, right?

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