Actually, the very best fiberglass is made from recycled Jack Daniels bottles. The off-grade fiberglass can be made from pickle jars and the like. I had heard that Royalex (tm) was made from old typewriters but I can't verify that.
Any boat can be a good boat if it is the one you have when you need one.
I have just been in a discussion with Jdupre' re: ageing of fir ply. In my experience, no matter what you paint it with, eventually the stresses of being peeled off a log, steamed, flattened and glued will come back to haunt the veneers and they will develop many millions of micro cracks. These are all capable of drinking a little water. After making eight boats with fir ply or luan I have come to believe that glass is good, epoxy makes it great, no paint lasts forever, once the cracks are in then NOTHING will flow into them and seal them up.
I love UJ pirogues. In a couple of years i may have to replace mine. I'll be watching Matt's designs and then i'll have to decide. For me, weight is not the final qualification, but car-topable is. I really like Keith and Seedtick's work, but I can't lift them onto the suburban. Of course, with Gub'ment Motors bent on downsizing everything it will be shorter lift onto the car tops in the future.
Back to work, piper