Mark _australia said..
but yeah it’s not new and why did windsurfing have a brief phase of hollow boards and it didn’t last…?
Too expensive for the general public. The market for them was too small.
I had a Patrik Diethelm hollow slalomboard, and yes it was earlier to plane (given you're a good pumper), but that was about it compared to the regular version. I expect for hollow wing boards that to be the same. I think in terms of feel / swing weight the difference is marginal, especially once it becomes more windy and you can easily ride a compact board 30L ish under body weight.
I think 99% of riders dont really get the benefit out of the reduced weight anyway, as long as the average foiler with 20kgs less weight needs a 1m2 bigger wing and larger foil than me to get going in the same wind that 1kg difference really isnt going to help them.
If you do get most out of your gear right now then maybe the 1kg will make a difference for you, whether thats worth the premium thats upto the individual rider.
I will try one if F-One brings one out, but I dont think for me it will be worth it, especially since most of the hollow boards arent built to be jumped with.