The point is not highlighting new nodes, but viewing the context of a reply.

Personally I think it could be useful, but would end up being counterintuitive unless the selected/viewed post is highlighted differently from its parent and children. Otherwise you'd think you might have clicked on the wrong link.

In reply to Re^2: Node parents shown while viewing a node by SuicideJunkie
in thread Node parents shown while viewing a node by oha

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