The Cambrian explosion of software refers to a transformative period where AI coding agents have evolved from rudimentary tools to powerful assistants capable of addressing complex feature requests in large codebases. The author reflects on their experience as a programmer, expressing nostalgia for the hands-on craft of coding while acknowledging the significant productivity gains brought by AI. They highlight how even seasoned programmers are adopting these tools, as demonstrated by a notable improvement in a visualization tool created using Google Antigravity. Despite the advancements, the author emphasizes that AI still struggles with crucial aspects of software engineering, such as system architecture, strategy, and user research. They argue that the rise of AI-generated software will lead to a proliferation of poorly constructed applications, making the role of skilled engineers more vital. There’s a pressing need for professionals who can manage, scale, and maintain this new software landscape. The author calls for robust systems in telemetry, security, and junior engineer recruitment to ensure the software ecosystem remains functional and sustainable amid this explosion of new tools and applications.