Sure is lucky that the title of the post explicitly says "mostly dead" and includes a big disclaimer about how not all of them are dead, then!
https://news.ycombinator.com/newsguidelines.html
Edit: that didn't work. I'm just going to take the whole 'dead' thing out.
I think the title was mostly just a pun/riff on the title of the other post linked in the first paragraph, which did claim to be a list of the most influential languages, and doesn't really make sense if read as a specific concrete claim.