So much has changed since that time. There's a great recent talk by Jason Williams and Paul Williams that goes into a lot of detail [1]. Most things now use TypeScript developed natively in VS Code using extensions and a CLI for the additional proprietary bits. That all nicely integrates with agentic workflows, skills, etc. ComDb2 is very relational, very battle-as-in-jepsen-tested and has been open-source for a long time now [2]. C++ is still king, but there's plenty of Python, Go, Rust, Haskell, OCaml, etc. running around.