I'm looking for a handle on the expected lifetime for a set of sails. The lifetime measure that I'm interested in is when a sail turns the corner so that it can no longer be trimmed correctly (but may still be far from "falling apart").
With a trailer-sailed boat like the DS, there isn't the same issue with UV degradation that someone would experience on a boat that is sailed on long passages, I'd imagine.
That seams to indicate that mere calendar age is a poor guide to where a sail is in its life cycle. You'd have to at least figure in the actual time sailed, and probably also the conditions.
How many hours do people put on their sails in a year? And how many years of useful life for a sail does that translate into?