Critically important is a metric that the doc notes: Apps should spend 90% of their time when they are not responding to UI-initiated tasks at "Utility" or less

Critically important is a metric that the doc notes: Apps should spend 90% of their time when they are not responding to UI-initiated tasks at "Utility" or less...and then there's a mechanism devs can use to actually see where their apps sit. Setting a standard is helpful, but providing well-engineered mechanisms and monitoring to accelerate compliance is critical to achieving the intended overall effects (let's say, battery life).