I'm not keen on leaving anything powered up when I'm not around. You never know what might happen. My 7100 runs the center channel in the HT half of my rig, so doesn't see much use. Simpler for me to turn it on only when I need it. I could use the trigger function from my MAC 3, but I don't always want to use the processor.
Good luck & happy listening!
Good luck & happy listening!