My own experience was that it (boat building/hany work) was something i had not done before and found it rewarding. Would recommend it if haven't tried making something yourself before. Dinghy or kayak seem most useful ans simple to do.
For this ply is ideal. So ply is still the best for some things.
So naturally its going to cross your mind when wondering how you might do an HP, unless you can make decisions quickly and certainly, then possibly you would not even consider it.
I think it may be used by someone if its a small enough HP, and they are not trying for excessive quality and have all the gear and materials ready set up to do it without extra effort. Definitely a market place there. Always be people going to throw a quick ply version together.
Just to much of a big step for some people to have to change to a new material and learn it and do it. Unless they have the goal of lightweight, high speed etc, then they just may not care one way or the other.

Doug