in the new update of Ubuntu oneiric 11.10 Ocelot, are two curious developments: first appearance of Deja Dup as a tool installed by default in the distribution. Second, and perhaps most strikingly, the disappearance default Synaptic.
not really surprising that eventually eliminated in favor of Ubuntu Synaptic Software Center, was beaten path for some time in the development of Ubuntu, but as the author of the note, to Software Center still lacks enough to completely replace as you can see on this page.
this change is only as default application as it is still available in the repositories ready for installation through the Software Center. Moreover, even four months for the final release of oneiric Ocelot so still have some time to complete the features missing from the Software Center on Synaptic.
Synaptic is itself is an advanced, multiple options and a fairly complete package management, making it a powerful tool in expert hands, however may be too complex for the claims Canonical to provide a practical setting, simple and easy to use.
Moreover, the inclusion of Déjà Dup proposed some time ago, was subject to the availability of disk space and a couple of requirements were: having an entry in the Control Center GNOME and integrate with Ubuntu One, the synchronization of Canonical. Apparently they steadily among its developers with the work.Thus
Ubuntu continues to make progress in their quest to develop a functional and stylish perhaps simpler(for taste and color), but at the same time lamenting a little “down” (symbolic most of all) of the legendary original Debian tool that accompanied us for a long time in Ubuntu.