Mitchell Hashimoto on Bun Migration and Coding‑Agent Driven React Native Rewrite

Mitchell Hashimoto recently highlighted that Bun has migrated from Zig to Rust, sparking a conversation about language lock‑in. A medium‑sized tech company used coding agents to rewrite both its legacy iPhone and Android apps to React Native, citing the platform’s recent improvements as covering all required functionality. The rewrite was driven by an agent‑based workflow, which can reduce the cost of maintaining separate native codebases. If the decision proves suboptimal, the company can port the code back to native with minimal effort. Hashimoto’s quote emphasises that programming languages are becoming less of a lock‑in, allowing teams to switch between ecosystems more freely. The discussion also highlights the trade‑offs of AI‑driven code generation, such as potential quality concerns and the need for human oversight. For agencies and enterprises, the example demonstrates how coding agents can accelerate mobile app development while preserving the option to revert to native when necessary.