What Fedora has always been to me is a test ground for what should go into RedHat. As long as RedHat has some place to let people test and play with technology, it can then bring in what it wants into RHEL. As long as that happens, Fedora is a success.
As far as what Fedora users and developers think is a success, I don't know.
I know what Fedora is
As far as what Fedora users and developers think is a success, I don't know.