From what I understand, their wrappers (which may have more natural sugars due to the aging processes involved) paired with the cedar sleeves are more prone to mold only when they are overhumidified. Most people don't over humidify their cigars at home, but in transit and at the B&Ms is where the problem begins. Once mold has started to grow it will do so even in humis with the proper conditions.
All that said, I have Anejos with over 5 years on them in their original cello that are fine. They have never been removed from their original packaging.
