It is an oxymoronic situation.
You create a content store so to avoid silos of information in the organization, namely files stored in folders on the network.
Then every department goes ahead and creates its own content store siloing the information that was meant to be shared in the first place.
Also I do not understand why and how the author of TFA compares Sharepoint to GNU, or for that matter Linux.
There are several competent Open source CMS, alfresco for one does a very good job.
If your going to pay cash for a system, Documentum or Open Text are far more evolved than Scarepoint.