good manners/managing expectations. if you normally turnaround within 24hours, people get used to this, so if you're going to be slower for a while, it stops them chasing saves that they assume got lost and need resending.
I used to be in several games that turned around every day.
(Classical was not one of those!)
If you're used to it, you start fretting when it doesn't happen....
..and the doctor has no pills for it.