 Ariane 5 ME was scheduled to fly in 2018, but the whole project was scrapped in favor of Ariane 6, planned to replace Ariane 5 in the 2020s.ESA's Ariane 1, 2, 3 and 4 launchers (the last of which was ESA's long-time workhorse) have been retired.Soyuz-2 (also called the Soyuz-ST or Soyuz-STK) is a Russian medium payload launcher (ca.