Evolving truck depots into drone depots is a great idea! For better or worse, driving a truck is a dying occupation.
In another post on this, someone wrote that there would be nest trucks that travel close to deliveries, or several deliveries, and drones would deploy from such trucks to do the final delivery.
Solves range issues, and to a point single payload deliveries, because it's probable deliveries would be done in say under 30 mins as a possible example.
It certainly will be interesting to see where all this is in a decade.