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As noted back in 2010, Canonical moved Ubuntu away from the classic GNOME 2 panel toward Unity as the default desktop for the Natty Narwhal (Ubuntu 11.04). Unity began life as a netbook-oriented shell and was folded into the desktop release to give a single Launcher + Dash workflow designed to simplify launching and searching. Natty (11.04) shipped with Unity as the default session on April 28, 2011. (wiki.ubuntu.com)

A practical note on hardware and choices: early Unity ran as a Compiz plugin and depended on GPU acceleration, so Ubuntu included a “Classic” GNOME session as a fallback. Canonical also produced a Qt/QML-based “Unity 2D” preview for machines without 3D drivers; Unity 2D was later dropped once the 3D path became more broadly usable. That explains ’s comment about graphics load and why and others preferred lighter environments such as XFCE or Enlightenment on older hardware. (wiki.ubuntu.com)

What happened after: Canonical announced in April 2017 it would end investment in Unity8 and shift the default Ubuntu desktop back to GNOME, and the community subsequently maintained Unity as remixes. The Ubuntu Unity project revived Unity 7 (first unofficial 20.04 remix in 2020) and later gained official flavour status for the 22.10 cycle. For a current system, switching shells is straightforward via metapackages and the login-session selector; example commands (run as root or via sudo):

sudo apt update
sudo apt install --install-recommends ubuntu-desktop
sudo apt install gnome-shell
sudo apt install xubuntu-desktop
sudo apt install lubuntu-desktop
sudo apt install ubuntu-unity-desktop

Log out after installation and pick the desired session from the login screen. Back up important data before large desktop changes and prefer the “--install-recommends” form for a complete desktop experience. (canonical.com)

Recommended Answers

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I have one of my computers with only the Ubunto distro of the Linux OS. As the years have passed and it has become more "window-like" I have found it easier to use.
I'm far from being a Linux maven and the improvements have enabled me to enjoy it more. I hope that this new change will continue the trend of making the Linux OS more acceptable to the computer world at large.

I have no comment as I have not yet used unity.
I'm still on Lucid

Ubuntu has been improve and refine by leaps and bounce in term of user friendly and experience. I believe it is easier for new user to switch to Linux without much pain.

Will I guess today's release can consume lot of Graphics :)

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