FedEx has rung my doorbell about 4 times in 15 years with over 100 packages delivered, yet they have time to fill out a card and stick it on the door. UPS rings about 98% of the time.
USPS usually rings the doorbell. I have called Fedex many times and they say they will instruct their drivers to ring the bell. But as I see that many other people have the same problem. Sometimes there is perishable goods that need refrigeration.
No one seems to give a *** anymore.
When I order over the phone I ask them to ship by UPS but I'm told the order taker doesn't make the rules. I never ship by FedEx.