A Million Lines of LLM Code Is Now Your JavaScript Runtime

Bun's LLM-powered rewrite from Zig to Rust demonstrates both the remarkable speed of machine code translation and the troubling risks it introduces. A million lines of AI-generated code deployed after just nine days of testing cannot guarantee the architectural soundness or edge-case correctness that critical infrastructure demands. This cautionary tale reveals the hidden costs of prioritizing velocity over the thorough human review that production systems require.