Ethereum account versioning

[axic]

It was not mentioned in this topic, but a related discussion took place here:

EIP-2348: Validated EVM Contracts

Discussion topic for A set of contract markers and validation rules relating to those markers is proposed. These validation rules enable forwards compatible evolution of EVM contracts and provide some assurances to Ethereum clients allowing them to disable some runtime verification steps by moving these validations to the deployment phase.

And speaking of validation, EIP-615 also proposed code validation.