I did the upgrade to Lubuntu 17.10 and for the most part it went smoothly. The only time I had a problem was when I tried to run Synaptic. It kept complaining about 'zesty' and the latest is 'artful'. I surfed a lot of user groups and did find one reference to /root/.synaptic and to change the line in synaptic.conf to the release you want to use. Rather dangerous, but, I made the change for DefaultDistro as root, saved the change and Synaptic is working!
Once Synaptic launched I did a refresh and it appears to work.
