I don't get what point is the author is trying to make. If it is to show that Rust outperforms C++ when implementing COW, I think he is mistaken. COW is intrins

I don't get what point is the author is trying to make. If it is to show that Rust outperforms C++ when implementing COW, I think he is mistaken. COW is intrinsically performance limited in multithreaded environments, this is not a language defect. The examples shown are definitely not apples-to-apples comparisons. The author compares C++ runtime-evaluated COW to a compile time evaluated strategy in Rust. At least, that is my take on this. I'm interested in learning Rust, but I feel either I am not seeing the whole picture, or Rust is only an interesting option if you are not already a seasoned C++ engineer. (with up-to-date practices on how to use the language)