The Arbitrum MSS onchain proposal has been executed and the Arbitrum MSS has been funded.
We anticipate that the MSS will start to be used in September, when the delegate incentives multisig is migrated to use the MSS: Proposal to Temporary Extend Delegate Incentive System. - #21 by axlvaz_SEEDLATAM.eth
The newly proposed Stylus Sprint also leverages the MSS if passed: [RFC] Fund The Stylus Sprint