Hello Bernd Ruecker,
sorry, i'm asking to myself, are you from an other planet?
For JPA: I don't see a big technical imporvement by using JPA instead of Hibernate directly. The implementation is the same. Using JPA just removes the dependency of non-standard Hibernate. And if this is required in a project, it normally is a political issue, not a technical. Hopefully that was more clear now...
Yes, i agree, it's "just" a story of removing dependency.