Very recently I was able to get a bootlooping N5X to temporarily boot, long enough to recover pictures, by putting it in to the freezer for a couple of hours. S

Very recently I was able to get a bootlooping N5X to temporarily boot, long enough to recover pictures, by putting it in to the freezer for a couple of hours. Some folks have (claimed to have) had long term success from freezing the bootlooping devices.