You wouldn't - first and foremost, this is probably most useful as a storage layer for some more higher-level data store.

Second, think of software artifacts from papers as a proof of concept, or a prototype. It's intended more to demonstrate some architectural innovation, and less to serve customer needs. Their ideas revolve around supporting a high level of concurrent access and removing the locking overhead that would normally stem from this, and an interesting way to handle spilling over to disk in larger-than-memory scenarios. This might evolve into a customer-oriented product eventually. Or perhaps get retrofitted into the guts of something like MS SQL server.