Be careful with that scenario. If the mobius is set to shut down immediately upon loss of power, that should be OK but if it is set for a timed shutdown (even 1 minute), the cam will go into shutdown mode & plugging it back into a power supply will confuse the heck out of it.
I do plan on setting it for immediate shut down because I will be replacing the battery with the Super Capacitor, but excellent point for others reading who may be setting it for timed shut down. I was not aware of this behavior so glad you mentioned it.
I rarely see myself using the "always on" outlet. Only case would be after an accident when I got out of the car and wanted to film the other driver, or if I stopped to go into a store and my car was facing in a direction where something interesting or suspicious was happening.