I was about 2 years into professional development when I started getting into Elixir. Recursion was a week or two of "err what?" then I got it. Functional composition is way easier to reason about than OOP design patterns (and should be since OOP design patterns are just over-complicated Category Theory).

The tooling gets out of the way, so a newbie is less likely to run into roadblocks. IEX is the best REPL I've worked with. Phoenix is much simpler to reason about than similar frameworks like Rails. And the docs are clean and consistent (+ dark mode). It was really easy to navigate through the docs, try things out in IEX, and get things working. It's just modules and functions. There's no classes, base-classes, abstract-classes, inheritance, instantiations and what-not. Just modules and functions. I doubt there's a better way to learn back-end development (DBs, Queues, Concurrency, PubSub, Distributed Systems, etc.) than Elixir.

A buddy of mine has been getting into Elixir recently while going to school for CS. The school's curriculum is mostly C#, Java, PHP, and what-not. He says Elixir demotivates him from some of the homework because everything in Elixir would be way easier.