One thing I like about Rust is that it prevents you from doing stupid things on the compiler level. I write a little bit of C/C++ and Rust. If you don't do C++ on a daily basis, you will silently introduce problems in the code that are very hard to spot. You just need to have a very good mental model of how to write good C++. It requires constant exercising.

For Rust, you just have to fight the compiler. This is especially useful when you have people on your team with some experience who also want to contribute, but you don't want to constantly point them in the right direction.

I actually have no idea how big teams work on large C++ codebases. Usually, you need to have a good idea of how the whole thing works. You can change one part of the code, and it will introduce bugs in the whole project because of how the memory is handled. Isolated changes are hard. And historically, a lot of C++ codebases lack good test coverage.