If you are feeling nostalgic, you can easily install Unity in Ubuntu 17.10. Here’s how to do it.
Ubuntu may have ditched Unity desktop. But these Open Source projects are trying to keep its memories alive.
GNOME will be the default starting Ubuntu 18.04 as Canonical shuts down Unity and Ubuntu Phone and gives up the convergence dream.
A list of the best Linux Desktop Environments with their pros and cons.
Changing position of Unity Launcher is very much possible in Ubuntu 16.04.