You can go crazy and embed an automated FW flasher on your device. Something like: move switch to position 1, turn on 3DS, wait for the led to come up, turn off, move switch to neutral position, turn it on and you there you have 4.5, turn off, move switch to position 2, turn 3DS on, wait for the led to come on, turn it off, turn it on and now you are on 9.2.
I could think of many different scenarios like having a button do a backup etc