The Alternate Title is:
At What Point Does an Official Ubuntu Flavor Become Off-Topic on Ask Ubuntu?
It must be agreed that a Live Ubuntu install is on-topic on Ask Ubuntu.
It must also be agreed that a Persistent or full Ubuntu install, with no 3rd party apps installed, is on-topic.
It should also be agreed that a Persistent or full Ubuntu install, with 3rd party apps, is on-topic, as noted in Ask Ubuntu Help.
Does customizing the boot screen and wallpaper make the Ubuntu install off-topic?
If I change the text in the splash screen or grub.cfg from Xubuntu to C.S.Cameron, does my install become off topic?
If a dedicated person does the above and adds third party engineering software to a Ubuntu flavor, does it make the flavor off-topic?
CAELinux is standard Xubuntu that includes advanced engineering software for CAE, CAD, CFD, FEM, FEA, Multiphysic Simulation, Electronics Design, Scientific Computing, Programming and Mathematical Modelling, There is over 4GB of Ubuntu 3rd party software.
xfce4-about confirms that Xubuntu is running:
The latest version of CAELinux is 2020 which is Xubuntu 18.04 with added programs. The question of Xubuntu 18.04 support is covered by "Any flavor of Ubuntu outside of the flavor team's 'support' period is still supported by Ask Ubuntu until the overarching Ubuntu release reaches EoSS or EoL (per the core "Ubuntu" version and not the flavors)." see https://meta.askubuntu.com/a/19617/43926.
To make the question a little more interesting, running
sudo do-release-upgrade -d upgraded CAELinux 2020 to Xubuntu 20.04 and kept all of the installed apps except for FreeCAD. I was able to upgrade FreeCAD by hand.
Running HardInfo showed that CAELinux was now Ubuntu 20.04.2 LTS with Xubuntu desktop session.
So the question is:
Is CAELinux Supported on Ask Ubuntu?
If not, at what point did it stop being Xubuntu and become off-topic?
If not, does CAELinux become on-topic after doing an upgrade even if nothing changes except the logos?
A Rose by any other name...