I think it makes sense. I love the system to select comments of youtube and instagram (for different reasons). From a consumer perspective it seems that on yt time matters while for instagram personalization matters a lot.

Here personalization might be the most straightforward way to do this but it destroyes the beauty (for my little experience) of HN.. To have something based on where you're reading would be a crazy cool add on: comments of the text while you read through and final discussion comments.

What do you think?