Since my question, Gentoo has changed in a favourable way. Guess what, I did not have the time to switch somewhere else. Enabling the binary repository for my existing Gentoo install was easy.

Once again I have zero complaints and I can stay on Gentoo. Updates don’t take ages anymore. (:

Canonical Landscape, RedHat Satellite, SUSE Manager and Foreman to name a few.

I think Foreman is the only one not tied to an Enterprise subscriptions and supporting more than one distro, but I could be wrong.