An unintended downside: imagine you have a close friend or family member pass away. You/their family want to access their devices afterwards for photos, remembrance, information about their final days, etc. Absent the biometric and passcode (which I am assuming you don't have) you will need the cord access to get in. With a billion devices out there, I am thinking this will happen more frequently than the law enforcement access it is intended to prevent.
And to anyone who wonders why this would even be necessary, I submit you have not suddenly lost a loved one. Not uncommon to go looking for answers or solace in their devices, notify friends of the passing, etc. Asking people to try to get in there within 7 days isn't always realistic or feasible.