I've never had an issue with memory management in C / C++ (and I've had experience of writing C#/Java in enterprise applications, so I know what not having to do it is like).
There is an overhead to having to think and plan for it, but in my experience of using it for things ranging from realtime systems through to high performance, multi-threaded image processing and rendering applications, at least if you're in control of most of the code and it's pretty good code, it's not really an issue.
Of course, if it's good code, then you're good. The issue is getting good code in the first place. ;) That's where static analysis can help: compilers are tireless. Humans are faulty.
Memory management issues cause tons of security issues in C++ applications. In the recent Pwn2Own, all of the security vulnerabilities in Firefox would have not been possible had Firefox been implemented in Rust.
There is an overhead to having to think and plan for it, but in my experience of using it for things ranging from realtime systems through to high performance, multi-threaded image processing and rendering applications, at least if you're in control of most of the code and it's pretty good code, it's not really an issue.