Well, a problem with that is we don't see the text of the node which is being replied to (I think I made a suggested that we see them some time back). So, as it is now, if someone makes a new node to expand upon another node, you have to click on the New Node, then click on the node it is referencing. Too many clicks simply to get context, IMO.
hen follow-up to the motivating node and update your old node to include a link to your new node.
Well, if I already cleared that node from my queue, I don't know it was updated, which was my original point :)