> The concepts it introduces are not such a departure from the concepts familiar to many programmers that a huge amount of learning is required. More specifica

> The concepts it introduces are not such a departure from the concepts familiar to many programmers that a huge amount of learning is required. More specifically, I would say that it lands in the Goldilocks range: It's not so alien as to make it inaccessible, while being alien enough that you'll learn something from it.