>> Ubuntu switched
>> GNOME for Unity
> 'Someone' needs to do their homework before saying things about which
> they are not sure.
> Ubuntu still uses GNOME.
> Unity runs atop GNOME.
> So does GNOME Shell.
To be even more detailed, the actual Unity UI is a plugin running on top
of the Open GL based compositing manager Compiz while the default toolkit
for applications, like the file manager Nautilus, is based on gtk3/GNOME.
GNOME Shell and Unity has a lot in common like the file manager and other
utilitarian applications like network manager, system monitor and text
editor. Otherwise they are very similar.