"There’s also the real possibility that the New York Telephone case doesn’t matter at all. The All Writs Act only applies where there’s no preexisting statute that addresses the situation — but we’ve added a lot of new statutes in the 39 years since New York Telephone was argued. Some legal experts have offered 1994’s Communications Assistance for Law Enforcement Act in particular as a relevant statute. If the court agrees, it would strike at the heart of the government’s case, punting the entire argument directly back to Congress.
The five questions that will decide Apple’s fight with the FBI | The Verge