Lehnardt assures the public that CouchDB is alive and well and that Couchbase is not "the company behind CouchDB" but merely one of the involved commercial enterprises that happens to have some CouchDB committers on staff.
In 2009 Canonical decided to base the data sync feature of their Ubuntu One project on Apache CouchDB. Its goal was to allow seamless synchro- nisation of personal data between different computers and devices and their cloud hosting service. A use-case that seemed perfect for CouchDB at the time, and we consider that still to be the case. Individuals from the CouchDB team have worked closely with the dev-elopers at Canonical to help making Ubuntu One a success. At some point in the past, these individuals developed patches to adapt CouchDB to certain Ubuntu One use cases. These patches diverged from the main CouchDB code base. Over time, it became harder and harder to reconcile these changes with the main CouchDB code base, so fixing bugs and rolling out new features from more recent CouchDB release took a lot more time and energy. At some point in the near past, we presume, Canonical decided to not pursue this any further. And we respect that decision and we wish them best with their development of their new U1DB, which is a database- agnostic API that takes after CouchDB's API, but is tied closer to their particular feature set. We'd like to thank Canonical for officially endorsing this part of the message.--Jan Lehnardt
Personally, it seems like Ubuntu One just had a very unique use case that needs its own custom solution. And there certainly wasn't nearly the level of mud-slinging we saw with the "Don't Use Mongo DB" saga.
As long as there are people who think certain NoSQL stores can be successful in any use case, we'll continue to see these attack-defend posts.