It looks like Paul White cleaned up (deleted) some comments on my old question, replacing them with a link to the old chat.
The link to the chat discussion looks reasonable: http://chat.stackexchange.com/rooms/32701/discussion-between-randall-and-a-horse-with-no-name
However, I'm getting
Page Not Found. Digging a bit, it seems he likely undeleted that chat room just yesterday to link to it. I emailed the StackOverflow team just this morning, and they found:
The system automatically froze the room about two hours ago, due to inactivity.
The 404 is definitely undesirable - is there a way to make a chat be persistent, and not re-freeze? Otherwise, how is it best to preserve (the useful parts of) the comments/chat? Granted, I tried to capture most of that content in a community wiki answer to the question, and I'm not sure the chat adds that much in this case.