I was thinking the same thing for my new 900. And I bet the same about the cables. They are not exactly like the UMC/HPWC for example.Not worth the trouble really. We have ours run 24/7 without any problems. I don't want to have to remember to have to plug it in and I know my wife wouldn't either. Nothing worse than having an accident and finding out you forgot to plug in your dashcam. I also suspect the actual plugs are also not rated for daily plug/unplug cycles so you may end up wearing them out.
Not plugged in meaning not locked in it's own private garage? Wouldn't you want dashcam footage if you came to find a dent, smashed window or similar?