I find the optional parentheses, and the way that keyword lists are defined to be the two biggest stumbling blocks when I come back to Elixir after a while way.

Coming from other languages, I find that

    example("with", 3, extra: "arguments", as: "a", keyword: "list")

    example("with", 3, [extra: "arguments", as: "a", keyword: "list"])

    example "with", 3, extra: "arguments", as: "a", keyword: "list"