Plan S was launched in 2018. At that time, cOAlition S recognised that transformative arrangements would provide a useful means to repurpose funds for journal subscriptions to publication fees, thus supporting legacy publishers in transforming paywalled to Open Access publication models. It was, however, also clear that the transformation would have to be completed at a definite point in time, by the end of 2024 at the latest. We maintain this timeline. We believe that the strategy of providing financial support for these arrangements—endorsed by many cOAlition S members—beyond 2024 would significantly increase the risk that these arrangements will become permanent and perpetuate hybrid Open Access, which cOAlition S has always firmly opposed.