Downloads happen in a different service, so WiFi or not should not matter. The TERM signal is sent immediately anyway; after that, unattended-upgrades stops the upgrade. unattended-upgrade splits updates into small dpkg runs and that is what we are worrying about - not the time for a complete upgrade.
Downloads happen in a different service, so WiFi or not should not matter. The TERM signal is sent immediately anyway; after that, unattended-upgrades stops the upgrade. unattended-upgrade splits updates into small dpkg runs and that is what we are worrying about - not the time for a complete upgrade.