So with usb drive there should be no corruption proplem even when the power is cut prematurely?
Why I want more sophisticated solution for the shutdown is that in the group i compete in with car audio, we do test for start up noises etc, the system will be powered off atleast one time during the judging, it would be shame if corruption happens at that time, and with some microcontroller based system i don’t need to have any additional delays, i can indicate the power of status at the very moment the pi is actually shutdown. Besides I love to tinker with electronics so i get to do things i like if/when im designing the circuit.