It's worth noting that the original "i quit" post never mentioned burnout. I didn't get the impression that it had anything to do with loren's reason for leaving, so it's strange for the reply post to bring it up like that.
This article wasn't solely a response to that one post, but to the general feeling perpetuated by HN. There are a good deal of other posts that show up on HN where someone misattributes boredom to burnout.