When viewing individual comment trees, usually by opening a comment from my own history that has replies on it, or just clicking view context: the original comment is the furthest indented, with the replies indented one less, and further replies to those less indented still until the lowest level comment appears as the oc, but at the bottom of the list.
Here’s an example:
Wow, never even realized that. Make an issue on github and I’ll take a look.
Done.