I'm surprised to see someone putting forth the argument that templates are easier to use than macros. I've found the opposite and in many cases the monomorphization of templates to explode code size which has a fairly material impact on performance in my domains. Debugging macros with cargo expand is infinitely easier than debugging template errors.

While you can write high performance C++ my experience is that many people will reach for shared_ptr and their like while Rust will force them into proper structure/ownership as Arc and their like have a lot higher friction.