Not quite. According to a more recent article, Facebook's PHP, Hack, is still a primary language: > For business logic and relatively stateless applications, t

Not quite. According to a more recent article, Facebook's PHP, Hack, is still a primary language: > For business logic and relatively stateless applications, the Hack ecosystem has the highest level of automation and support at Meta and is the recommended language. On a related note, their Rust usage has grown significantly: > For performance-sensitive back-end services, we encourage C++ and Rust. Rust is a new addition to this list. There’s a rapidly increasing Rust footprint in our products and services, and we’re committing to Rust long-term and welcome early adopters. For CLI tools, we recommend Rust. This is a new recommendation for this year. https://engineering.fb.com/2022/07/27/developer-tools/programming-languages-endorsed-for-server-side-use-at-meta https://engineering.fb.com/2022/07/27/developer-tools/progra...