Rust language

“Rust teams at Google are as productive as ones using Go, and more than twice as productive as teams using C++.”
Lars Bergstrom, Google Director of Engineering, Android Platform Tools & Libraries, in RustNation UK 2024.

Now that there is Open XL C/C++ and Open Enterprise Languages for C/C++ (generally a good level of sync with LLVM), the time is ripe for making Rust work in z/OS.

1 - It unlocks a whole new level of speed & productivity by allowing the port of high-performance packages in the Python ecosystem; many of which are increasingly building their back-ends in Rust.
2 - As a language, irrespective of its initial learning curve, there is a generally accepted belief that if it compiles, it will work. Compile-time checks & lints (clippy) are extremely helpful in catching bugs and as guard rails to help stick to good development practices.
3 - Being a strongly typed language, describing MVS data areas (of which there are plenty in z/OS) comes naturally. There is also meta programming with macros, that will help reduce repetitive work, help with code-gen, etc.
4 - Writing parallel code also comes naturally, making it easier to put those CPs to good use.

The ecosystem is strong, and many companies such as Cloudflare, Google's Android, Microsoft's Windows, xAI, etc. are leading the way with Rust adoption for solving their internet scale problems, and with good results.