Isn't that just a timing issue? Why chalk it up to HN immediately when it's more likely to be the general interest in the language increasing and more people using it for less time are writing about it? This is a good thing as these people will probably lead the future for its use.
It's just the name I give to languages or tools that get big online and generate a lot blog posts and shoddy learning material. Though most of the time it does start with HN.
BTW I love Elixir and I'm happy to see it grow. Nothing bad about HN hype it just has its positives and negatives.