I am using Lubuntu 19.04 and am very pleased with the speed and performance however support has now ceased for this iteration. The question is should I go back to Lubuntu 18, as suggested, or switch to Ubuntu. My PC is a virtually new HP Pavilion with plenty of grunt.
From the Lubuntu EOL message is
Lubuntu 19.04 End of Life and Current Support Statuses
Lubuntu 19.04 (Disco Dingo) will reach End of Life on Thursday, January 23, 2020. This means that after that date there will be no further security updates or bugfixes released. We highly recommend that you update to 19.10 as soon as possible if you are still running 19.04. After January 23rd, the only supported releases of Lubuntu will be 18.04, with LXDE, and 19.10, with LXQt. All other releases of Lubuntu will be considered unsupported, and will no longer receive any further updates from the Lubuntu team.
You can find instructions on how to upgrade your Lubuntu installation here at our manual page.
You'll also note later in the reference, the reason I'd suggest not returning to Lubuntu 18.04 LTS, ie.
Note, due to the extensive changes required for the shift in desktop environments, the Lubuntu team does not support upgrading from 18.04 or below to any greater release. Doing so will result in a broken system. If you are on 18.04 or below and would like to upgrade, please do a fresh install. The installation image can be obtained from our downloads page.
I would strongly recommend the upgrade to 19.10, providing a path to move to Lubuntu 20.04 LTS currently in development.
Neither. You do not need to reinstall Lubuntu 18.04 or start over with Ubuntu 18.04 LTS, because you can upgrade to Lubuntu 19.10, which is very easy, and fully supported.
This is a general solution for all users of Ubuntu, Lubuntu, Kubuntu, and other supported Ubuntu flavours.
sudo apt update && sudo apt dist-upgrade sudo apt install update-manager-core
For reference only, if performing an upgrade from an LTS version (not the case here), also do
sudo nano /etc/update-manager/release-upgrades
On the file's last line, change the value of Prompt from lts to normal .
Save the edit with Ctrl-O, then press Enter to confirm and exit with Ctrl-X.
Either way, continue with
When it completes, reboot, and run
lsb_release -a to confirm 19.10 is installed OK.