I used gnome-shell for a while and I became addicted to the possibility to add workspaces simply moving a window in the last one on bottom; and obviously to remove all remaining empty workspace except the last, used as a trigger for new ones. I do not know if I explained well.
Is there any extension/configuration to add this feature to Unity?
EDIT: to avoid confusion I post a video that shows how workspaces are added and removed automatically by gnome-shell
Thanks