It failed to no one's surprise. Apple sure loves to lock down everything they can.
One word: firmware.
Can they not just rip the firmware off the other board and flash it into there? Similar to cross flashing bios? Or ubsolder the firmware chip and swap it for the other one?
I guess jtag or whatever isn't possible in this scenario. Because clearly they somehow got the Os/fw into there
He still owns both, do they work (now) with the organs back in the correct bodies?
I get that this was a hack (for science?) not a money saver.