The real issue is that C++ does implicit _deep_ copies by default on assignment and that you can't retrofit the language to change that. One quick, fast solution to avoid such shenanigans is to follow the one parameter `explicit` constructor rule religiously and always mark copy constructors explicit unless you know as a fact the type is trivially memcpy-able. This fixes most of the issues.

Another problem with C++ references is that they aren't really reference types, they are aliases, so they have wonky semantics and crazy nonsensical features like `const T&` doing lifetime extension