I expect it did cost a lot, but then there are a lot of people that spend millions on racing boats, so there will be a market for them. And of course this is just the first one. Now that it has been done there will be more people building them, and they will probably be adapted for general use. Not telling what will be coming up for high speed sailing in the future now that the barrier has been broken.

Bill Gill

C is not the speed of light in a vacuum.
C is the universal speed limit.