tooling cost for curved boards are considerably higher than for straight ones.
And you can debate the pro's and Cons for ever, but the only ones I see arguing that the curved boards are not a definite performance gain are those that have not even sailed a relative boat with curved boards... I suggest you all go and try them before passing judgement on the performance gains and the ease of use.
I did stop reading this forum for a long time but i was called to have a look at the curved board section so i did read it.I am not always agreeing with Andrew but he is right on this one. The curved boards are another dimension and very difficult to get the maximum out of them. Besides the costs of production , it is very difficult sailing them in a good way, it needs a lot of practice to get the benefit of it otherwise it is always loosing. I have found out already unfortantly.
Hans