[easeout]

Swift Concurrency as a feature set includes async/await and async for, which solve a large part of Combine's same problem with better safety and less setup/teardown. These days Combine is still useful, specifically for multiple observers and several cases of adapting to older event publishing sources.

[DidYaWipe]

Combine is for setting up observers to changes, whereas Concurrency is for async operations. I don't see the relationship.