More flexible collaboration across workplaces

At the moment, you can only use data that is stored in the local workspace for dataflows and real-time dashboards. For example, it is not possible to transfer data with a dataflow in WS A from WS B to WS C. I find this very inconvenient when designing the domain/workspace structures and, in my opinion, it creates unnecessary data redundancies. I would be in favor of enabling a completely flexible way of working and collaboration between workspaces. Isn't that also one of the reasons for OneLake?