Comment by GTP

I'm not answering your question here, just saying my opinion on C++ vs Rust. I think that the big high-level difference (before diving into details like ownership and the borrow checker) is that C++'s safety is opt-in, while Rust's safety is opt-out. So in C++ you have to be careful each time you allocate or access memory to do it in a safe way. If you're working in a team, you all have to agree on the safe patterns to use and check that your team members are sticking with it during code rewiews. Rust takes this burden from you, at the expense of having to learn how to cooperate with the borrow checker.

So, going back to your question, I think that the answer is that it depends on many factors, including also some non-strictly-technical ones like the team's size.