I really like Elixir... but to say it's ruby 3x3 isn't quite fair. While the syntax is ruby-like, even the simplest ruby program isn't directly portable to Elixir. It's definitely something different, so saying things like this is misleading.
It'd be closer to say:
> Ruby 3x3 is here already. It's called Crystal ;)
Definitely check out Elixir and Crystal though if you need more performance.
I understand that you're an Elixir enthusiast, you probably feel like people have not yet seen the light and they need to be educated about superior alternatives, but two things about that:
1) It borders on proselytizing and it's annoying to see people coming over to preach the good word on every other Ruby article. If your language of choice has merits, it doesn't need hype men, people will use it naturally.
2) Elixir is not Ruby, stop trying to sell it as such. They're two completely different languages. That one has heavily influenced the other's syntax choices is merely a sign that the language author liked what he found in Ruby before creating Elixir.
It'd be closer to say: > Ruby 3x3 is here already. It's called Crystal ;)
Definitely check out Elixir and Crystal though if you need more performance.