I'm the guy who wrote that post - My guess is the front page might block urls that have been posted before. This post finds its way to HN every 6-12 months as

I'm the guy who wrote that post - My guess is the front page might block urls that have been posted before. This post finds its way to HN every 6-12 months as a fresh post. Still, it's really nice that it still gets attention from the HN community, and even nicer that each time, the discussion is more productive and inquisitive.