|     There are places where infusing and folding might make sense,

If you had read the links prior, you would have seen how a hull can be made with flat panel. And where Steinar cheats.
Or the box molds Rob uses more generally.
Neither of these will work for your hulls, perhaps. But Rob does Cat work, so you could ask him to draw up what would be needed to do an Intelligent Infusion version of the hulls and bridge deck you want. I mean I am guessing it can be done. I am guessing Rob might me interested. I imagine he can.

| It was recently suggested that one could do a slightly curved bend,

I think you should re read. Here is the quote, I think. I have to guess, because you didn't quote it.
"
| The only time this can be done is when the finished seam angle will be a straight line.

Why can it not also be a simple curve?
"

I suggested 'the seam' could have a bend. That suggestion was in the context of box molds. I did not suggest the bend could have a curve. Stop putting words in my mouth.

| in other words bending on two axis at once. This is impossible with flat dimensionally stable material.   I suggest trying this on the

I suggest you actually read the shit posted. While I didn't say one could do it, this was referenced.
http://harryproa.com/wp-content/uploads/photo-gallery/Custom%2020%20NORWAY/ww%20hull/IMG_1088.JPG

What does that look like to you?

| I can do this with metal

You figure your the only guy with tricks?