Only good reason would be for bulk log searching, but a lot of cloud providers will already capture and aggregate and let you query logs, or there are good third party services that do this.

Pretty handy to search a debug_request_id or something and be able to see every log across all services related to a request.

> but a lot of cloud providers will already capture and aggregate and let you query logs

This is just the cloud provider taking the dependency on their logging service for you. It doesn’t change the shape of the graph.