This post is mean, and has no place on Hacker News. It's fine to say there's no reason to ever use Ruby for a game, but it seems like the main purpose of your post is just to call into question the OP's intelligence and experience.
I thought he was just calling into question the link-baity title.
The title is designed to be controversial as people don't like their favourite programming language to be slandered, thus they will be obliged to read the article so that they can defend their baby.
Using link bait as a title is contrary to HN guidelines, so if anything, it is the article that does not belong on HN, not the grandparent comment.
He coded his game in one language and then SWITCHED in mid-development to another, with all the delay and hassles that that brings, in order to get links...
It is mean. That's nothing wrong with trying new thing even if most people are saying it's the wrong choice. And there's no shame in failing in the process. People will say, I told you so. But you never know until you have tried it, and you would learn a lot in the process. And sometime you might just have a break-thru.
