You're very diplomatic (yet downvoted), C++ is an abomination of a language. It just puts too much accidental cognitive load on developers. I understand that

- it shines for some tasks where Rust isn't capable enough

- it's impossible to get rid of because of all the code so we may as well modernize it

- there's an active community of people who built a career of being C++ experts and have no interest to see the language disappears.

Even in the LLM era, I find it's difficult to code in C++. The language has so many corner cases that LLMs make mistakes. My experience 6 months ago was that the code written by my agent had tons of complex linter warning (exceptions, lambda leaking references, futures whatever... that I just can't avoid because the codebase mixes all of this). Whenever possible, it's probably time to either modernize it or port it to Rust, component by component, until the C++ part is small or inexistant.