Nearly 100% of OpenAI employees use Codex weekly—not just engineers. Andrew Ambrosino, product lead for the Codex desktop app, explains how AI has inverted product development: implementation is now cheap, making taste and curation the bottleneck. Instead of writing docs to de-risk expensive engineering, teams prototype freely, then filter the best ideas. This shift demands new skills and team structures. Implementation is no longer the expensive part of software development; taste, curation, and deciding what to build have become the primary constraints in an AI-first environment.