Pulumi Cloud's new Time-to-Live (TTL) Stacks feature addresses the challenge of managing temporary cloud environments in software development by automatically controlling infrastructure lifecycles, thereby reducing costs and security risks. This feature allows platform teams to set a predefined lifespan for any stack, ensuring that temporary environments used for development, testing, or staging are automatically decommissioned, thus preventing resource wastage and operational burdens associated with manual oversight. Available on the Enterprise and Business Critical editions of Pulumi Cloud, TTL Stacks enhance cost control by terminating unused resources, enable developers to test application changes without cleanup concerns, improve operational efficiency by reducing administrative tasks, and bolster security by minimizing the potential attack surface of idle resources. Users can configure TTL schedules through the Pulumi Cloud Console, API, or Service Provider, providing flexibility in managing infrastructure tasks and ensuring a clean state in cloud environments.