The concept of stateless Ethereum opens up possibilities for building a client that can execute blocks in a stateless manner, along with the notion of Stateless Account Abstraction. In a stateless account abstraction, the mempool is separated from the account state, effectively isolating the state from validation and execution logic. Users can participate in the mempool without explicitly providing state information. Instead, their transactions can be verified based on other criteria such as cryptographic proofs and witnesses.