Its his personal blog, what do you care what he writes it in? Maybe if it was 10 years ago and getting slashdotted was still a concern you could point out a better way, but if a free Heroku instance can keep up with HN traffic, then perhaps "doing it right" no longer matters. It seems the OP wanted to learn something and see if it could be done, so I'd say he achieved his goals. Getting all butthurt that he didn't achieve yours instead just seems silly.