Originally Posted by 200
This explains my futile search... any idea why it is not possible to flash a bootloader via recovery (again, something which I was never able to find!)?
I am not sure but i think if you want to flash ANYTHING in any recovery, the recovery must mount the following partition on your phone, so if you want flash kernel, recovery must mount kernel partition erase and write new one (just for example), in this case, i think bootloader partition is in restricted area where is not accessible by any recovery (may be intentionally)
Again this information is not 100% but after a few years flashing different phones i have this conclusion about this situation.