Pretty sure a total electrical failure will preclude a successful autorotation failure on a swashplate-based drone as well as you still need to power the actuat

Pretty sure a total electrical failure will preclude a successful autorotation failure on a swashplate-based drone as well as you still need to power the actuators (and the avionics). So redundancy (including in the DC bus) is just as valid of an option as autorotation is… more so as you could continue powered flight and means you can survive blade failure, etc.