on the 20.04 base...

https://www.phoronix.com/news/Ubuntu-23.10-Recalled

Ubuntu Touch is now powered by Ubuntu 20.04 LTS, the current 3 year old Ubuntu  !

mais avant c'était en 16.04 ...

in addition to re-basing to Ubuntu 20.04 LTS, the new Ubuntu Touch release is aiming for Android 9+-based device support, has forked Unity 8 as Lomiri, switched from Upstart to systemd for its init system, shifted development from GitHub to GitLab, moved from Anbox to Waydroid, and has adapted many of its components to be able to build properly under GCC 12 and Qt 5.15

puis le nombre de bugs ... :
https://ubports.com/fr/blog/ubports-blogs-et-nouvelles-1/post/ubuntu-touch-ota-1-focal-release-3888

During the Ubuntu 22.04 LTS press briefing, Mark Shuttleworth also indicated he is looking at a possible IPO for Canonical in 2023.
https://www.nextinpact.com/lebrief/68993/ubuntu-22-04-est-disponible

HIGHLIGHTS
Linux 5.13.0
Gnome 40.5
Proton 6.3-7
Mesa 2/21/3
DXVK 1.9.2
Wine 6.0.1
Ubuntu 21.10 ("Impish Indri") - Release Notes
In terms of application programs, Ubuntu 21.10 ("Impish Indri"), which will receive the next LTS version with Ubuntu 22.04 LTS on April 21, 2022 with support until April 2027, has also been brought up to date. In addition to the free Mozilla Firefox 93.0 browser, which is being delivered as standard for the first time in snap format , the distribution comes with the Thunderbird 91.1.2 mail client and the LibreOffice 7.2.1 office suite, among other things.

APPLICATIONS
LibreOffice 7.2.1
Mozilla Firefox 93.0
Mozilla Thunderbird 91.1.2
Inkscape 1.1.1
GIMP 2.10

https://www.nextinpact.com/brief/ubuntu-19-10---eoan-ermine---est-disponible-10030.htm

mais limité aux "on public clouds and Docker Hub"
https://www.nextinpact.com/brief/minimal-ubuntu--une-version-degraissee-pour-le-cloud-4870.htm

en test :
https://www.phoronix.com/scan.php?page=news_item&px=Amazon-EC2-July-2018-Boot-Times

New in Ubuntu 18.04 LTS Bionic Beaver
Here are the highlights from the Ubuntu team on the new release:

Linux 4.15 kernel with Spectre and Meltdown patches and AMD Secure Memory Encryption support
Configure networking through netplan.io. ifupdown has been depreciated
Updated MD driver for software RAID improvements and new ZFS on Linux support
Python 2 is no longer installed by default. Python 2 will be moving from main in 20.04 LTS.
Supported by Canonical until 2023
Runs on all major architectures – x86, x86-64, ARM v7, ARM64, POWER8 and IBM s390x (LinuxONE)
New ubuntu-minimal images that are smaller and boot faster
A new, default server installer ISO with a new interface and faster install
LXD 3.0 – Linux containers including clustering, Qos, and resource controls (CPU, memory, block I/O/ graphics, and storage quota)
Updates to LXD (v3.0), DPDK (v17.11.1), Postgresql (v10.3), Libvirt (v4.0), Open vSwitch (v2.9), NGINX (v1.13), Qemu (v2.11.1), Docker (v17.03), Puppet (v4.10), MySQL (v5.7), PHP (v7.2), and more
OpenStack updated to OpenStack Queens release.
Here are a ton of other changes. You can check them out here.