The weak point of a laminate is typically the resin and not the fiber.
Polyester is actually a fairly bad resin for glassfiber (and carbon) as the resin is much stiffer (breaks at shorter elongilation) than the fiber itself. Under strong loads, a polyester laminade develops microcracks and the strength goes down and it gets heavier.
The key in your boat is that its made of epoxy
which is much softer and enable the fiber to take up the load. Make a Epoxi/carbon sandwich construction, and you end up with a very strong and long lasting laminate. The key to look out for is delamination
, but that should not be an issue on a well built boat.
To give some practical examples. In 505, a very competitive racing dinghy
(just below olymic level). When the boats were made out of polyester, the competitive life was around 2-3 year. When made out of Epoxi, a 15 year old boat has won the world championship, and this in a very competitive class.
boat has a carbon mast
which is 10 years old. Its as good as new.
I have no experience of the Seacat (very cool boat btw), but if its well made and not a superlight construction pushing beyond the limits (production boats rearly are), I see no reason why it shouldn't last well over 10 years being as good as new.