Airframe made of composites has much lower thermal conductivity than aluminium. Nett result... airframe takes longer to get cold on the way up.... once cold... takes longer to warm up on the way down...
3) Plane lands, doors open, passengers get off. Cabin fills with air far more humid that the 15% talked about on this thread.
4) The moist air, inside the aircraft, getting close to the airframe, forms condensation.... Since the airframe is cooler than we see in aluminium airframes.... we see more condensation....
Not necessarily. Airframe made of composites has much lower thermal capacity as well, so less "coldness" stored in the airframe.
GA experience: Aluminium airframes parked outside have water accumulation inside in the morning, GFRP airframes parked outside do not (or significantly less). Might be an issue of the sandwich construction as well, so for a monolithic dreamliner it may be different again.