Of course, before the official release, Ubuntu engineers needed community help to test the ISO image. So in the next few days the team will release a candidate image version, and other flavor versions will follow. Adam Conrad wrote in the mail log: "As of now, Cosmic has entered the Final Freeze stage and is preparing for the release of Ubuntu 18.10 final stable next week. We will close cronjobs and release some candidates this Friday night or Saturday morning. Mirror."