I think it is important to recognize that this will only apply to generic normal software, which is already mostly written in memory-safe languages for government e.g. Java. Data infrastructure with state-of-the-art scale, performance, and workload requirements will continue to be written in C++ for the foreseeable future, largely because there is no alternative. Maybe Zig some day?

A pattern I’ve seen (and used myself) is that the heavy core engines are written in C++ for performance and maintainability but skinned with a Rust API wrapper. Rust is closer to a “better Java” than a C++ replacement for extreme systems software.