“...expensive compared to delivery vans?” Lets turn that around and imagine that drones had been the normal delivery method for some years. How would we feel about scores of noisy dangerous multi-ton trucks and vans rumbling past our houses? As it stands, existing delivery methods are killing thousands of people directly every year and probably tens of thousands indirectly with their poisonous exhaust fumes. For sure, there are issues to be resolved but why the near-universal determination here to “prove” there is no alternative to the status quo?