I agree that trying to outcompete seems really hard, but also:
Given what the experience of using a non-rooted phone is like, how very very tight the sandboxing is and how useless it is a General Purpose Computer that will tell you anything: I find it very hard to believe the unlocked phone is going to let you start probing firmware & snooping on hidden volumes.
This post sent my BS detector on high alert. I'm struggling to take it seriously.
you do realize what the threat model behind a hidden volume is right?
no one will be accessing the firmware through the OS, they will access it from the PCB/chip/debug port. there is no point to a hidden volume if you cannot credibly deny its existance.