The Migrate your Elasticsearch data section has grown over time, and it needs some attention.

Migrate your Elasticsearch data

Focus: Platform-to-platform: Self-managed to ECH or ECE
The main topic is about migrating from self-managed to ECH or ECE, with a note that the steps can be adapted for other scenarios, such as when the "source cluster is managed by Elastic Cloud on Kubernetes, or when migrating from Elastic Cloud Enterprise to Elastic Cloud Hosted."

Subsections cover migrating from one Elasticsearch cluster to another

Focus: Cluster-to-cluster

• Reindex from a self-managed cluster
• Migrate system indices
• Migrate with minimal downtime

Migrate Elastic Cloud Hosted data to Serverless with Logstash (recently added)

Focus: Platform-to-platform: ECH to Serverless
This recently added topic is important, but doesn't fit neatly in current structure and narrative. It's discoverable from the left nav, but isn't integrated with other topics.

Phased approach

We could use a phased approach, starting by adding a note from the main topic calling out ECH->Serverless using Logstash for a quick win, and then follow-up with more thoughtful restructuring.

Additional benefit:

"Reindex from Remote" is now in Elastic Cloud Serverless in Technical Preview and should be documented and folded in.

Related:

#4039 (comment)