There's quite a good video on "Drone Delivery Was Supposed to be the Future. What Went Wrong?". It's been a decade since Bezos launched drone deliveries but it hasn't taken off for a number or reasons including air traffic control around airports, people living in flats and the difficulties of getting a drone to find a safe spot. On the other hand Uber Eats type guys on ebikes have proved a practical solution. https://youtu.be/J-M98KLgaUU