The article by Dillon Watts provides a detailed guide on how to clean up and manage legacy .env files scattered across multiple repositories to enhance security and productivity. It outlines the risks associated with unmanaged environment files, such as security vulnerabilities from leaked secrets and inefficiencies due to configuration drift, which can lead to deployment issues and wasted developer time. The guide recommends a systematic approach to audit existing .env files, remove outdated or unused variables, and migrate secrets to a centralized management system like Doppler for increased security and streamlined operations. It emphasizes the importance of automation and team-wide policies to prevent future sprawl, and advocates for a phased migration plan to minimize disruptions. The article also encourages using tools to automate tasks and ensure a smooth transition, ultimately aiming to create a robust and secure infrastructure for managing application secrets.