It takes time and resources, but Rust is being used, e.g., https://www.memorysafety.org/initiative/rustls/ https://www.memorysafety.org/initiative/rustls/ which

It takes time and resources, but Rust is being used, e.g., https://www.memorysafety.org/initiative/rustls/ https://www.memorysafety.org/initiative/rustls/ which has been being worked on at least 6 years https://hn.algolia.com/?dateRange=all&page=0&prefix=false&query=rustls&sort=byDate&type=story https://hn.algolia.com/?dateRange=all&page=0&prefix=false&qu... ... I'd hope and guess that resources are increasing, especially as governments realize that software security is their problem too.