In my not-a-lawyer opinion, I think that Apple will absolutely take this as far as it can. With only an 8-member court, Anthony Kennedy becomes even more important than ever.
We should be lobbying SCOTUS harder now than ever before. We need them to rule against this far more than we need to be calling congress people.
We need the Supreme Court to act with the effect of precedent. But I'm not optimistic. We would need Roberts and Thomas to back off their national security platforms, and we need RBG and Kagan to understand the problem better.
Kennedy is a wildcard, but if we can explain the issue in plain English to those key people and get them to agree, this is doable. Alito and Sotomayor will fall in line.
If we do our jobs as members of the body politic, write amicus briefs, and hound the members of the court, this is doable.
Thomas and Roberts can be swayed. So can RBG and Kagan. It would be an easier 5-4 decision with Scalia still around, but this is possible without him, and we need to focus our efforts.
I'll be putting my money where my mouth is over the weekend and creating a website that submits comments to the individual justices. I'll also be asking for help/edits on the boilerplate I'm offering as a starting point.