DHH, AI, and the Future of Rails (www.fastruby.io)

At Rails World 2026, DHH, the creator of Ruby on Rails, pivoted the conversation away from Rails itself to focus on the profound influence of AI agents in programming. He announced that his company, 37signals, is halting hand-coded development, opting for Rust backends for its HEY app—promising significant performance improvements with drastically reduced CPU and memory usage. While some in the community welcomed this shift, the discussions raised concerns about the diminishing visibility of foundational technologies like Ruby and Rails in application development, especially as AI takes a more central role in code generation. The keynote and subsequent discussions emphasized the importance of understanding the underlying components of applications, as reliance on AI could lead to a disconnect in maintainability. Matz, the creator of Ruby, echoed this sentiment, highlighting that while AI tools can enhance productivity, they shouldn’t replace human oversight in understanding and maintaining code. As Rails evolves, the community is eager to strike a balance between leveraging AI advancements and ensuring that developer experience, code readability, and comprehension remain at the forefront, with implications for the future leadership of the Rails community still to be determined.