GNU requires contributors (and maintainers) to assign copyright for non-trivial contributions. Benno doesn't want to do this, thus in GNU's eyes, he can't be the maintainer.
You can argue (and it has been, to death) whether copyright assignment is right or wrong. When it comes to GNU projects, it's the rule of law. Based on mailing list posts and contribution history, it seems like the project had probably been in questionable GNU territory for awhile, given Benno's strong role and his unwillingness to assign copyright. I'm curious to see how the GNU project will respond.
You can argue (and it has been, to death) whether copyright assignment is right or wrong. When it comes to GNU projects, it's the rule of law. Based on mailing list posts and contribution history, it seems like the project had probably been in questionable GNU territory for awhile, given Benno's strong role and his unwillingness to assign copyright. I'm curious to see how the GNU project will respond.