My dream is that an increase in drones would lead to a decrease in vehicular deliveries, to the point that there would be a net decrease in noise.
But in my heart of hearts I am certain the convenience of drone delivery -- and an absence of sufficient regulation -- would lead to a drastic net increase in noise instead.
Electric trucks are nearly silent. Drones are much louder in my experience. Do I misunderstand your comment?
This dream is naive. One truck rumbling (or humming, in the near future) through your neighborhood delivering packages to each of your neighbors over the course of 30 minutes will be replaced with one drone per neighbor.
If they must exist, I hope they're priced/taxed such that they're used sparingly.