Xubuntu 19.10 Upgrade

The system told me there was an update, and I hit GO.
I don't normally do what I'm told, but I trust Ubuntu.
Upgrading from 19.04 to 19.10 (Extreme Elephant).


USUAL DISCLAIMER
I have a customized desktop, so upgrades don't look different.
I like my menus at the bottom, not the top.
The Ubuntu people sometimes get way too excited over new colors and shapes on the desktop. They should absolutely have their fun.


As usual, the upgrade completed quickly - perhaps 15-20 minutes.
Note for the ADD people: watch the terminal. It will ask you questions the moment you get busy with something else.

It went smoothly.
Then it got a little unpleasant, which I haven't experienced before.

Thunderbird threw up issues. The Lightning calendar coughed and died, as did a bunch of addins. The addins didn't play nicely with Thunderbird and only some of them were replaceable.

There were a few tiny icon changes.
BFD.

All of the sudden, the machine developed a locking screensaver.  This was disconcerting, as I didn't install it. All sorts of options presented themselves. Nothing worked, including adjusting the Illudium P-32 Explosive Space Modulator. After some research, I was sent to the screensaver to adjust everything there. Apparently this overrides other settings.


Otherwise, it works as it did - just fine.
Verdict: safe to update, unless you don't like versions starting with E.