The question is not how long have you had them, but how much have you sailed with them.
It really comes down to the use you make out of the sail. Some laminated sails
, like CAL
(custom axis laminate), can offer amazing performance and light weight for a very good price
and if you only sail the odd local race
etc, they can last many years with only the odd small repairs
for normal wear.
Take them ocean cruising where they are up for weeks at a time, with a lot of UV exposure and strong winds at times, and they will start falling apart in short order. A single
can equate to years of local cruising or racing
in many cases.
Woven cloths are much longer lasting and a well-built sail out of a top-quality cloth can perform for a long time, but it is likely to be quite heavy. My mainsail
weighs over 60kg, I can pull it up to the second spreaders and then I have to winch
the last 6 metres up.
By the way, there is a brilliant book about sailmaking and modern materials available as a free PDF (at the moment anyway) from its author here