2024-08-27: MakerDAO initially launched as DAI, a single-collateral stablecoin backed solely by Ether (ETH). When the project introduced Multi-Collateral Dai (MCD) in 2019, the original version was renamed SAI, while the new system adopted the DAI name again. The Single-Collateral Dai (SAI) was eventually phased out, with holders encouraged to migrate to the new DAI system. Now, under the Endgame plan, MakerDAO is transitioning into Sky, introducing Sky Dollar (USDS) and the SKY governance token. Starting September 18, 2024, DAI and MKR holders can upgrade their tokens to USDS and SKY, respectively. However, both DAI and MKR will continue to exist with the same functionality, allowing users to choose between the established tokens or the new versions with enhanced governance and features.