the Solana Foundation has initiated the SIMD-0215 proposal, which adds a new hash called "Accounts Lattice Hash". It uses homomorphic hashing to maintain the hash of the entire account state, which can be updated quickly and securely. This allows for (1) each block to contain the hash of all accounts, not just the accounts changed in that block, and (2) the removal of Epoch Accounts Hash. If adopted, it will replace Epoch Account Hash with a lattice-based approach, enabling efficient and real-time updates to the account state without reprocessing all accounts.