I have no doubt it's working for you and your customers. But JEE and JSRs have been a dead end for many years now. When there are only single implementations for JSRs left, the whole exercise becomes pointless and masochistic, doesn't it?
In 2006 I played around with Jackrabbit for an architecture concept (for managing airworthiness of airplanes and kit). That was before the Iphone even existed. I was honestly surprised Adobe is still using it in their AEM product. From what I recall, it manages a document tree, based on a 2004-ish, Drupal-like node graph in typical Java enterprise fashion.
I'm no insider, but my guess is Adobe is struggling for some time now to integrate AEM, Magento, and other purchases into a lineup for creating shopping experiences. We'll see how this works out.
