Comment by krapp

You can have a chronologically sorted tree view - sort each subtree chronologically and then the root comments, keeping the hierarchy. HN doesn't do it because it would undermine the goal of karma sorting, and potentially lower the quality of conversation*. You could arguably do it with a flat view (I've seen some alternate HN views posted as Show HNs that do so) but you would have to add chan-style greentext links to everything which IMO makes things uglier.

* It probably wouldn't really but HN is incredibly paranoid about that sort of thing. Pun intended.