I have an a Raspberry Pi 4 running Ubuntu 21.10-server arm6. I just learned that it reached its EOL after trying to update/upgrade the software. I actually forgot that the installed system is not LTS(shows how rarely I touch its terminal). I'm running some services on this server and already forgot how I configured it(that was Q1 of 2021), so I prefer to just upgrade it instead of re-installing everything from scratch.