By now most folks know Amazon and the US Postal Service have a deal and the USPS is delivering packages on Sunday. I don't know the peculiarities of this deal, but it seems different. My packages are dropped off by my door. Rest of the time they go to a package locker next to my cluster box. If a cluster box is good enough the other six days week, why not on Sunday? I just don't know that I need stuff that fast.
Meanwhile, Zappos [an Amazon subsidiary] insists on delivering my shoe purchases overnight. I'd be happy if they arrived in a couple of days, frankly.
I just don't need stuff that fast.