I am into my second dingy in 30 years. The first was an 8' Eli fiberglass
dinghy that we towed on the back of our sailboat for about 5 years.
Later, we decided a more stable dinghy was better for our family
so we moved to an Avon 10 RIB
, hypalon of course. The old Avon is still in perfect condition after 25 years of use. Our first 8HP engine (Yamaha) went belly up 5 years ago which we replaced with an 8HP Mercury 2 cycle. The old Avon is outlasting the engines!
One of our friends 20 years ago purchased a PVC dinghy and in a few years... it failed so he purchased another PVC dinghy. I tried to convince him that spending a few more bucks up front would provide better long term service
but he was looking for a cheap
out. Well last season his second POS went the same way his first POS took. He finally replaced it with a Hypalon he purchased from Defender.
As others above mentioned, PVC is not going to stand up to the sun and we don't get the same amount of sun here in New England
as folks in the southern states.