In real life, many unpressurized aircrafts like DC3 and such have survived into 2010s and remain in continuous service, which I heard it is made possible partially due to the lack of pressurization and thus the lack of fatigue on the airframe per each flight. Would it make sense to remove the "Max 35 years" age rule in AWS?
As I was looking for info about the Basler BT-67 conversion of DC-3, then I realized that as the conversion's launched in 1990 in real life, which in AWS all DC3s would have been scrapped by then.