One of the main reasons Rust needs this capability is because C++ has it, and Rust wants to interop with it. It's not that better model (enabling it additionall

One of the main reasons Rust needs this capability is because C++ has it, and Rust wants to interop with it. It's not that better model (enabling it additionally can bring benefits, but also complications; enabling it by default, like C++ does, is a terrible idea).