[CONSTITUTIONAL] AIP: ArbOS Version 40 Callisto

[Tane]

We vote FOR the proposal on Snapshot.

We have reviewed EIPs to be included (and not included) in the Callisto upgrade and we find the rationale behind each decision clear and articulated. We are particularly excited about the EIP-7702 change to be included on Arbitrum One and Nova for users on those chains as we believe the change will drastically improve the user experience over time.

We have a couple of questions:

@Arbitrum

Please note that ArbOS Version 40 “Callisto” is a proposed upgrade that builds upon ArbOS version 32 which has been previously adopted by the ArbitrumDAO - this proposal increments the version number to 40 instead of 33 due to technical details that allow for better Orbit chain customizability as explained here

Even reading the detailed document, it wasn’t clear what the “technical details” are and why this change better serves the Orbit chain customizability. Could you clarify them?

@Arbitrum

While the goal of the proposed ArbOS 40 “Callisto” upgrade is to eventually be available for adoption by any Arbitrum Chain, this proposal only concerns the Arbitrum One and Arbitrum Nova chains

While it makes sense that the proposal currently targets only Arbitrum One and Nova, how will these changes be adapted and applied to Orbit chains going forward?