I have noticed that there has been a change in the SystemReady bands reported, they seem to have reduced from 4 bands to 2, what has happened to the SystemReady bands?
The SystemReady bands have been consolidated into two compliance bands: SystemReady band and SystemReady Devicetree band. These align with the two principal OS and firmware environments used today (ACPI and Devicetree), making it easier for manufacturers and their customers to understand each bands benefit. For more information on the current bands see the updated SystemReady Requirements Specification (downloadable here: https://developer.arm.com/documentation/den0109/) and the SystemReady program page (https://www.arm.com/architecture/system-architectures/systemready-compliance-program)