@array good suggestions to note.
I don't really know what this machine is for now. In March 2020 it became my work-from-home computer with just the task of running a Citrix client for remoting to the office. Thus allowing my main personal computer to remain always free for my own use. At that point it had Xubuntu 18.04 on it, which was still current.
Fast forward to now, I have a newer 64bit laptop, letting my old one take that role.
As 18.04 no longer updates, hence over to Debian which does.