One potential downside to this on the posts/comment front is that if the thread in question is not in a community your instance is federated with, any form of local redirect would yield just an empty post with no comments. Lenny’s current federation is primarily push driven, so when requesting a post from an unknown community will yield no historical comments, as your instance have never subscribed to the community and thus never received the push notifications. Whereas getting sent to the original instance, you’d be able to see the full interaction history and have a better picture of the intended discussion.