Parabellum, the answer is US, Europe, S America and East Asia. Many of the busiest airports in the world.
I understand what you are saying but the PNF should be able to handle mode control changes, talk on the radio and all the other normal duties that accompany that role. Some airports are more demanding than others and use of the autopilot can help lower the workload. Problem is when it starts being a habit and you can't cope without it.
How would you cope with an autopilot failure for instance
