My understanding is that you still need a developer certificate from apple which has a limited lifetime. So you're not given permanent control over your device

My understanding is that you still need a developer certificate from apple which has a limited lifetime. So you're not given permanent control over your device in the sense of unshackling you from the manufacturer, which is a requirement for repairability. They're merely handing out breadcrumbs to give the appearance of a way out which they can retract at any time.