well, I disagree. if someone wants to continue a thread of mine, which I thought of as an ending, then it should be not allowed, no matter who.
If they want to continue the story, fine, that is what chyoa is there for, but not from an ending.
But yeah, I get what you mean, I just see it a bit different. But I know that I am not in the majority here, but rather the exception, so yeah, I get why it is not included.
Go with the needs of the many, not with the needs of a single guy who just happened to make a post on a thread about it.