According to ChainCatcher news, the Arbitrum community has voted to approve the “ArbOS version 11” proposal and is currently waiting for implementation. The proposal proposes to introduce several improvements to Arbitrum, including support for the EVM Shanghai upgrade and PUSH0 opcode, as well as various bug fixes. The improvements, now audited and ready for adoption, span Arbitrum Orbit, Arbitrum One, and Arbitrum Nova (the proposal covers the latter two), while the ArbOS upgrade can be considered an Arbitrum hard fork.