New high-scale data infrastructure projects I am aware of mostly seem to be C++ (often C++20). A bit of Rust, which I’ve used, and Zig but most of the hardcore stuff is still done in C++ and will be for the foreseeable future.

It is easy to forget that the state-of-the-art implementations of a lot of systems software is not open source. They don’t struggle to attract contributors because of language choices, being on the bleeding edge of computer science is selling point enough.

Game development, graphics and VFX industry, AI tooling infrastructure, embedded development, Maker tools like Arduino and ESP32, compiler development.

https://github.com/tigerbeetle/tigerbeetle

Out of curiosity, do the LLMs all use memory safe languages?