On July 30th, according to Arbitrum's official news, the ArbOS 31 proposal has been released, including Stylus and other improvements, marking the beginning of Arbitrum's move towards the future of multi-virtual machines (MultiVM). Voting will begin on August 1st, and the community can view the proposal details and comment on the voting page. The upgrade aims to activate Arbitrum Stylus, support Rust and C++ smart contracts, optimize secp256r1 elliptic curve verification costs, and improve Arbitrum Nova's expense routing system to simplify the fund management process.