Everybody’s mileage varies. I’m in a fairly high volume mail house. In or out probably half a dozen things a day, not counting junk. More in the holiday season. I get maybe one or two problem items a year. And “problem” for me is generally no more that 2 days late.
I have a friend who sends items from her post office in NY and I can count on one hand the issues she’s had in the past few months. She sends and we and others do not receive and they are not returned to her.
I think there is so much incompetence.