Cello isn't a petroleum based plastic. It's a mostly plant-based product that is very permeable. There are some plastics that are called 'cellophane,' but those generally aren't used in the cigar industry. So, either cellophane or no cellophane should be acceptable.This.
Plus, I have got to think that since cello is a molecular substance, there must be the possibility of a hint some transference of plastic-like aroma to the tobacco, no matter how insignifigant.
Guess I just like the organic nature of free-range stogies.