I don’t think it matters in a practical sense. Our streaming overlords have already shown that by crippling the effective color space of supposedly 4K video they care little for quality of broadcast. Crushed blacks and smeared video are all you’ll get no matter what the standards say. They were, are and remain terrible on 1080 video, 4K is a farce.
You’ve missed the point: each addition can (and likely will, based on history) be the way to bring more patents into the market. It rarely has anything to do with objective quality (except in the marketing)