I'd like some more information, how are drones better than cleaners and sorters?
what do the drone hubs do?
and I'll repeat what does "auto" as a designation do?
what is a 'couple' drones? is it 1 per X regions?
you're severely underestimating how much a million and a half were at the end game, it was hours of just idling when active play was a decently paced incremental up till then.