People often say that modern c++ doesn't have the problems needing a solution like rust. Ironically that means people who write modern c++ haven't had any aramp up time needed when joining our rust projects. They were already doing things the right way. At least mostly. But now they don't have to worry about that one person who seems to be trying to trick the static analysis tools on purpose.

Anything that involves object graphs (as opposed to trees) is a pain in Rust.