If you are sitting by the beach waiting for the wind to pick up and I offer you a $300 piece of foil that you can mount it to the twin tip and takes only 10 minutes to master, you will be going up wind like crazy. Would you buy it?
But I would feel utterly dissapointed almost cheated, when I came back the day after, to see that the other guys/girls where just blasting so much faster, so much higher, so much easier - on their directional foils
Almost like buying a cheap 1998 two lined kite in 2013, and discovering the day after, what others are using nowadays.
You are very right though - that if it could be made much stronger and tougher, it might be able to find a niche.
I just got the feeling, it is like the mutants - they dont really exist anymore either, as too many compromises for most likings
In my eyes, inventions are building new things that "push the envelope" and move the borders a lot
Then there will usually be very downgraded versions for us as the "public", true.
I could be proven wrong, but I honestly doubt that a TT hydrofoil will catch on...
The ideas and thoughts and testing is exiting though - as always