Ephemeral workspaces for Terraform Cloud Plus offer cost savings, increased efficiency, and improved security by automatically destroying non-production resources at scheduled times, reducing infrastructure costs and streamlining workspace management. This feature benefits organizations by giving them more time back to focus on other tasks, simplifying management and testing through the use of time-to-live settings, and improving compliance with security requirements. The auto-destroy feature can be easily configured through the UI or API, and notifications can be set up to send reminders before a destroy run is triggered, ensuring that infrastructure teams stay on top of their resource cleanup.