Apple has resisted pressure from law enforcement in the past. That gives me a real reason to believe that they will not fold in the future.
Apple has since confirmed in a statement provided to Ars that the US federal government "prohibited" the company "from sharing any information," but now that Wyden has outed the feds, Apple has updated its transparency reporting and will "detail these kinds of requests" in a separate section on push notifications in its next report.
On the other hand, Google isn't exactly working with the authorities either. They moved Google Maps' location history to on-device storage because of the many warrants they were served, for instance, and they too refuse to decrypt phones.
These companies know to pick their battles, but they did take on the government various times.
This is untrue at some technical level: Apple is currently unable to break AES-256.
The San Bernadino case was about having Apple create and sign new firmware that would enable a brute force attack - which could easily be unsuccessful. I don't believe the Secure Enclave found in newer models even allows for a brute force attack (enforcing some delay, among other things) from BFU state.
As a side note, they do fight sometimes, they fought the EU's DMA for example, but in Russia and China, they complied without a fight though to my knowledge.
See? No laws broken, perfectly safe.