Hmmm, yes true if upwind is an issue it is a problem...
I dislike the square short boards that goes upwind like a raceboard almost, and like the more classic wave shapes that goes slowly upwind only, so upwind IS an issue indeed, especially when you also foil, you feel like you are wasting a big part of your life going upwind on waveboards
But that has to be proved true or not, the upwind ability, later.
What about the DTL riding, has aynone tried it, worse or equal or better than LEI's???
Of course, like everything else, one has to get used to it, so just doing it one time might not say anything.