Flesh and spirit are usually the limiting factors
Fiberglass is an amazingly strong material that has far surpassed all expectations since its meteoric rise during WWII. A modern sailor's flesh and bones, not to mention his stamina and spirit, usually wear out long before the fiberglass does. Well over 30 years ago, as the newby skipper of a 35 ft Pacemaker Drift-R-Cruz houseboat in the Netherlands, I ran into a white-haired sailor with a wizened old face who happened to be leaning over the heavy seawall ringing the little harbor where we had just docked. He took a long sip from his pipe tobacco while looking Rivendel I over from bow to stern. Then he fixed his gaze upon me while softly but clearly murmuring: "there was a time when ships were made of wood and men were made of steel; now ships are made of P L A S T I C ........." He did not have to finish his train of thought. I understood.Flying Dutchman