Yes, I’ve read that other thread and others about this issue.
Thank you very much for your detailed reply. I’ve been an Ubuntu user for 17 years, mostly on Ubuntu and Xubuntu but also on Ubuntu MATE in the last few years, but always as a passive user, never getting involved into it and never getting to know how it works and how is it done.
Right now I’m on two old computers, Xubuntu on one and Ubuntu MATE on the other which is dying so I will have to keep only one computer, I’d love to stay on Ubuntu MATE, but the future of this flavor is now more uncertain than ever before. So I don’t know if I should stay on Ubuntu MATE and keep going forward, or just forget about it.