a couple of weeks ago we were setting shuttle on a local creek, my buds did a bad tiedown job and we heard a noise looked back and saw his boat come off and it started down the hill through the woods hitting rocks and trees and dissapeared outta sight off a 60-70 foot cliff.
my buddy started walking to get down to it and we continued to our put in about 1/4 mi or so up stream, we gave him a roll of duck tape by the time we got to him he was still sitten there looking at the boat it had landed upside down right next to the creek bed.....unscathed!
we all expected some dammage but she was good to go! plastic is much more durable and useally cheaper, but fiberglass can be repaired and nothing feels as good as fiberglass in the water.........wood has got to be heavy. composites are generally lighter..........

One bad thing about plastic is that it doesn't like sunlight. Left outside uncovered and it gets real brittle. Also extream cold does stuff to plastic. As a kid I remember getting a shotgun for Christmass. Wanting to try it out, I threw my frisbee in the forty below air and shot it and the frisbee shattered. Usually a frisbee would be good for much more target practice in warmer weather.

My Perception Dancer lasted out 20 years of abuse on two continents before finally splitting open along old rock gouges, I'm a true believer in plastic boats after the nightmare of fixing fiberglass ones over & over, yuk. I had an even earlier River Chaser which had all the strength of a Cool-whip container but I loved that boat, too.