I recently came across this video:
The kid is obviously very skilled. He's foiling on a very small board, a long mast & a pretty small (foiling) wing. The wind is strong - perhaps 20 - 25 knots? - which means he's very powered up & riding very fast in open water with big & fairly unorganized swells. This looks very different from the gliding around on gentle swells/waves that you more commonly associate with wing foiling. I think kite foiling in those conditions would be pretty demanding & intimidating. What he is able to do is cut off the power more easily in order to control his speed when he needs to. I feel that downwind kite foiling at those speeds would make it very difficult to control the kite & maintain control of board speed. Thoughts?