Rust lacunae

"Modern C++" doesn't give you memory safety. It's still easy to create dangling references and the standard library doesn't do array bounds checks. If modern C++ provided memory safety, "writing at a level of abstraction that confines risky operations to trusted libraries", Google, Microsoft, etc would not be adopting Rust.

> the resulting panic cannot be presumed to clean up properly before exiting. This sort of thing is hard to get right, and only comes with maturity.

GNU coreutils can't even be bothered handling SIGPIPE when stdout is a closed pipe. "Graceful exit" is not their forté.

OTOH, in Rust RAII is *the* way to clean up resources, and panics run those drop handlers, so Rust panics generally clean up after themselves quite well.