Miracles do happen! But not very often.

July 1990 - At 5:00 PM Thursday I put a letter in my neighborhood mailbox(Bolingbrook, IL).
The letter contained an order for sunglasses from a seller in Texas.
At 10:00 AM Saturday morning the sunglasses were in my mailbox! Miracles do happen!

More recently: Less than an hour ago I went to my mailbox to retrieve a package that the online tracking info said was delivered Friday. No package!

Last week Amazon forcast a package delivery on Sunday. No package! I checked the tracking info Sunday night. 'Unable to deliver due to incorrect address.'
They had no problem finding the address on Monday. They just didn't want to deliver on Sunday, as they were paid to do.

There's LOTS more.

Over the past three years USPS has cost me at least $300 in lost packages.

The carriers are incompetent aholes and the management doesn't care. :-(