What is Elixir? For my Ruby friends

> So, Elixir isn’t just a functional Ruby. It’s more like a functional Ruby running on a custom-built operating system that we can design and control from the very language itself to create self-healing applications.

I get that this was a huge novelty when Erlang first showed up. But with today's deployment methods(kubernetes) doesn't every common web stack get the same self healing / auto scaling benefits? Your average devops people are now mostly doing Kubernetes , it could actually slow down their productivity for them to relearn everything in Erlang/Elixir. I basically don't see the big deal anymore (other than perhaps less memory overhead with Elixir) but maybe I'm missing something.