However, from a broader DeFi perspective, Aave V4 is not the only player in the concept of a unified liquidity layer. The Spark liquidity layer in the Sky (MakerDAO) ecosystem has already taken the lead in technical practice, achieving certain success in the use of stablecoins and integration with other DeFi protocols. In addition, some smaller projects have also explored and practiced in the field of cross chain liquidity layer. From a longer-term perspective, the competition between Aave, based on the lending track, and Sky, based on the stablecoin track, may truly determine who will be the ultimate winner in the DeFi track in the future.