Clarifying context of comparison

Just to be clear for all the readers here, Conary has had all the features you list since near the beginning of the development process (rather than delta RPM, it's native format is a changeset which is normally relative; a reliable analog of delta RPM). There are some specific ways that the way Conary supports some of those features is better than RPM, and I'd be happy to discuss them, but it's somewhat out of scope for this thread.

To be clear; RPM existed before Conary -- given that Erik Troan was the principal author first of RPM and then of Conary based on his RPM experience, that would obviously be the case...