Ah yes, "what kind of meaningful data is passed besides the most important concept in the language?"

Also, the ownership mode, a concept entirely missing from Kotlin or Scala.

As GP says, Rust's syntax is pretty noisy, but much of the noise is answers to questions other languages don't even ask.

And many complains are requests for additional noise for things which are just regular in Rust, like additional syntactic sugar for Option and Result.