In 2019 a new class of ferries known as the River-class were announced, with the new class to replace the SuperCats and HarbourCats. In December 2021 SuperCat Saint Mary Mackillop was retired from passenger service, after a few River-class ferries entered service from October 2021. On 31 August 2022 Susie O'Neill was retired with Louise Sauvage being the next to retire on 22 March 2024. On the 28th of April 2024 SuperCat 4 was retired and left for Newcastle after being sold. All 3 of the vessels are inactive awaiting buyers. Saint Mary Mackillop was sold to a party boat company in Geelong and renamed Hygeia IV where it now serves as a charter party boat.