I rarely use Ubuntu so I'm late to observing some things. I just updated a 20.04 LTS system to a 22.04 LTS system. I did it via a command line (through SSH). There were several warnings about SSH being dangerous because communications could be lost when problems arose. SSH is my normal way of communicating with headless machines so I thought that this was a bit unfortunate. It turned out that I didn't have a problem. The installer informed me that ThunderBird would be provided via SNAP and that there is no other form. I don't like SNAPs but I probably wouldn't even have noticed if the installer didn't tell me. I wonder how many other SNAPs are installed. I think that I can ask the system but I've got other fish to fry at the moment. The upgrade seems to have worked rather painlessly. I'm used to Fedora version updates where only updates of a year are promised to work. This Ubuntu update was a two year update: a nice technical achievement. When I log in now (via SSH) I get this announcement: 9 additional security updates can be applied with ESM Apps. Learn more about enabling ESM Apps service at https://ubuntu.com/esm It seems unethical to withhold security updates. This is one reason why I don't like Ubuntu / Canonical. Long before the update, my system failed to come up in a desktop environment. It just came up in a console. That console is almost unreadable: UltraHD in a 15.6" screen. The console has 135 rows and 480 columns! I never figured out why the system didn't come up in the desktop environment. I spent a little time at that but it didn't really a lot since I only used the Ubuntu installation once a year or so for a program that Fedora didn't have. The system upgrade was an attempt to bypass the bug. No such luck. I guess I'll put a little more effort in analysis.