Some of us work for a living and are not home all day to wait for a package. Right now UPS, USPS, and FedEx drivers leave my packages inside of my car in the driveway. If the packages are left on the front step, they are in full view of thieves. I'd rarely ever receive anything if a driverless car or drone left packages on the front step, and if it's raining, all those packages the thieves didn't get would be soaking wet.
Thanks, but no thanks.