Comment by fallenscope

> It already has been proven that LLM's can maintain such codebases.

It hasn't. Those are two different scenarios. The first is individual PRs into an existing, majority human-authored and understood codebase where the PRs are initiated and merged by humans even if the code is AI generated. The second is AI rewriting AI written code that no human eye has seen. Bun took a conservative, transliteration file-by-file approach so they still understand the data structures and architecture so they will probably be okay though.