@trwnh @darius In practical terms, I think the most important implication of that is that when I tap on it, my client should open it as a post, not a webpage. Also, embedded media should be live.
There are open UI questions about whether other things about the quoted post should be inherited by the parent, things like content warnings (probably) and @ mentions (probably not), but those all depend on semantically understanding that the thing is a post to start with.