In the software development industry, traditional static testing environments are being replaced by ephemeral testing environments. These short-lived environments mimic a production environment and keep it in sync with it for building and testing feature branches. Ephemeral environments offer several advantages over static ones, including cost control, parallel processing, new opportunities for build strategies, clean environments, and ease of implementation using tools like Kubernetes. They enable teams to adopt continuous development workflows, reducing the time spent on environment setup and maintenance. By creating ephemeral environments, developers can focus on building and testing their code changes quickly, while also minimizing the costs associated with maintaining multiple long-lived environments.