It’s really exciting that ubuntu finally gets rid of Unity and switches to Gnome as its primary desktop environment. But some of the unity features are reproduced within Ubuntu 17.10.
What if you are the one who prefers the snappy gnome hot-corners over the fancy unity dock? Here is a one-liner to get the hot-corners back and to finally get rid of the dock
> sudo apt-get remove gnome-shell-extension-ubuntu-dock && gsettings set org.gnome.shell enable-hot-corners true