Tom Peplow makes an announcement:
Alongside Workspace monitoring and user activity tracking accessible through Microsoft Purview, these capabilities make federated data governance a reality at enterprise scale.
Enable diagnostics at the workspace level, and OneLake streams diagnostic events as JSON into a Lakehouse you choose—within the same capacity. You can use these events to unlock usage insights, provide operational visibility, and support compliance reporting.
It does seem a bit odd that this data goes into a Lakehouse rather than into an Eventhouse. But click through to see how things work, what sorts of events this captures, and what you can do with it.