I habitually installed earlyoomd on ubuntu systems. When upgrading to 22.04, the earlyoomd package is cheerfully updated. But now there is systemdoomd. I'm a bit surprised by the fact that the upgrade just lets this pass without comment.
Does it matter?
Why would you be?
systemd-oomd was announced back in January, and earlyoom was always a Ubuntu community package found in 'universe' thus wasn't included on any Ubuntu media (may have been in community sourced flavors though I'm not aware of any usage; I didn't look).
You installed that community sourced package & it's your job to maintain it. The Ubuntu release upgrader just upgrades your packages, including the Ubuntu community repository software.
You're free to disable systemd-oomd (see here for how) and continue using what you used in the past.
