It had more comments than upvote-points, HN automatically buries high comment to point ratio threads to avoid incitement. Not sure if that applies here, just throwing that out as a possible explanation.
The thought did cross my mind that, given the focus it has had on HN over the past few days, there may be a concerted effort to try and bury things like this where the sentiment is overwhelmingly against WP/MM/Automattic. Tinfoil hat territory I know, but this really did drop like a stone. It's really the only time in all my years on HN I was genuinely surprised to not find the post 'where I left it' on the front page after a few minutes away.
