Wu said that the Solana Foundation has initiated the SIMD-0215 proposal, aimed at expanding Solana's infrastructure to billions of user accounts. This proposal adds a new hash, called the 'Accounts Lattice Hash', which uses homomorphic hashing to maintain the hash of the entire account state, allowing for quick updates and security. It enables: (1) each block to include the hash of all accounts, not just the accounts that changed in that block, and (2) the removal of the Epoch Accounts Hash.