LaunchDarkly's free plan now includes progressive rollouts, allowing developers to release features gradually and monitor for any issues that may arise. This tutorial demonstrates how to use this feature in a Python FastAPI application to upgrade to a new API version. By gating updates with a LaunchDarkly flag, developers can control the pace of their releases and ensure a smooth transition to the latest version. The example provided showcases how to set up a progressive rollout for an API update, allowing users to see new features at a controlled rate while minimizing potential risks.