> By the way the difference is that Rust is not a standard, thus is easier to evolve (the process is much shorter).

Another thing is ABI.

C and C++ are ABI-stable, which means that many historic mistakes (intmax_t, std::regex, polymorphic allocators) are impossible to fix.

Rust only promises source compatibility, not ABI compatibility, so it has a lot more freedom to tweak its design.

https://thephd.dev/binary-banshees-digital-demons-abi-c-c++-...