Everybody pilot will agree with me that a 'minimum 2 persons on the flightdeck' rule only serves the prevention of one falling asleep.
I also think we are planting lettuce upside down if a CA has to supervise the lonely pilot.
Pure 'Window dressing'.
But I see an opportunity for loco's to engage pay to fly, non typed MPL holders to act as 'pilot observers'.
They can invent a whole stack of SOP's for them too.
All in the name of safety.
Hopefully the public will buy it, and the crew puts up with it.