Not that it's a bad thing in any way, but the title of "hacker news" is a bit disingenuous when "developer news" might be a little more accurate. I wish I could filter out the programming and startup stuff.
My opinion wasn't so much about what would replace those posts, but what not having those posts would attract.
Are you looking for news related to network security?
In short, simply re-creating something in a new-wave language is what I'm kind of complaining about. That's not "hacking", that's just good programming.
Ruby _can_ be used hacking. "How to recreate Path in Ruby" does not a "hack" make.
I suppose for example /r/gamedev isn't awful, but really, GameDev.net is much bigger and better. There's little reason to bother with Reddit.