During Ubuntu 17.10’s six-month development cycle, Didier Roche managed to keep the community updated with the migration of the Unity user interface to the GNOME 3 desktop environment, which is the default session for the Artful Aardvark release. The GNOME 3.26.1 packages will be used in Ubuntu 17.10, running on top of the next-generation Wayland display server. Those who want to use X11 instead of Wayland will find the “Ubuntu on Xorg” session via the login screen, GDM (GNOME Display Manager), which supports lots of other sessions that are available for installation from the main repositories. Among these, there’s a vanilla GNOME 3.26 session without Canonical’s modifications, and the Unity desktop, if you install the ubuntu-session package.