Pulumi ESC enhances the management of secrets and configuration across multiple environments by introducing composable environments that can import other environments, thus reducing duplication and complexity. This system centralizes the management of secrets and configurations, allowing them to be reused across Pulumi Infrastructure as Code (IaC) Stacks, Pulumi Insights Accounts, and various platforms through integrations. The recent updates have introduced discoverability features, including the "Imported By" tab, which enables users to understand downstream dependencies by showing all environments and stacks that import a specific environment. These features allow users to filter and sort by imported versions to assess the impact of changes and provide warnings for potential disruptions when deleting environments or modifying version tags. Additionally, the enhanced environment page and stack visibility offer valuable context about relationships and dependencies, making it easier to manage complex infrastructures with confidence.