My suspicion is that most business owners don't care about ANY of that.
even returns - it might actually be enough friction that returns would go down.
for example, why would a donut shop give receipts?
I have a friend who recently opened a bar. He did cash in the beginning, but finally got the electronic payments for the bar installed. He immediately caught a bartender stealing.
He noticed that at the start, the bartender got a lot of tips. But when the electronic payment system went in, the tips were not anywhere near as much. He reviewed everything and found the people in the bar do not tip well.
What the bartender was doing was selling drinks and putting many of the cash sales entirely in the tip jar. When the electronic payment system went in, he wasn't handling as much cash and the lower tipping rate showed up.