Not having to pay some token fine multiplied by however many times your employees didn't perfectly pencil whip the temp checks in the 3yr record retention period when you sell some bad fish and get audited as part of the investigation into that.

Not having to pay extra employees to maintain the fridges I guess

Shifting when they consume electricity to take advantage of price differences during the day?

I would think that might have an impact on the temperature inside said fridges.

Yes, fridges don't have constant temperatures anyway. So you can shift when they run around a bit.