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duzzi said..
Apparently they cannot sustain miles of upwind sailing
You're confusing "can" and "want". Why in hell would you go upwind for miles? The best reason to go upwind is so that you can go downwind afterwards. On slalom gear, that's because you're going fast
onlyon a downwind course. With a foil, that's much less the case since foils can go upwind at roughly the same speed as downwind. But you really
wantto go downwind because playing with swell is where the fun is.
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duzzi said..
and so there are downwind trips, with cars at both ends.
Downwind trips are a lot of fun on the fin or on the foil. But with wing (or kite) gear, it's simply a lot easier, since your gear takes up a lot less space, so you can easily fit multiple sets in a normal car or small van. And the fun factor will be higher when the chop gets bigger, or the wind is variable.
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duzzi said..
And the upwind maybe be better with respect to a wave/freestyle wave board, but it does not look like they are going much higher than my slalom board
How about some data? Here's a couple of polar plots from the same person - slalom board first:

Here's a plot from a wing session:

The sailor in question is a very good winger, but an even better slalom sailor (#1 in the GPSTC overall women's ranking). She was going for speed in the slalom session, but just having fun in chop with the wing. Maximum upwind angles are similar, but come with a big speed penalty on slalom gear. Considering that her average speeds on 100-140 degree angles were about 3 times higher on the slalom gear, the average upwind VMG is surprisingly similar - around 8 knots on the wing @ 35 degrees to the wind, and 9 knots on the fin @ 60 degrees. Both sessions resulted in big grins, but the one after the wing session was bigger and laster longer.
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duzzi said..
It is the attitude of the "new toy" children that is a little bit aggravating
While calling other adult water sport enthusiasts "children" could be considered insulting, perhaps you are onto something. Children tend to have an open, inquisitive mind, and will quickly change their favorite activity if they find something that more fun. Many people loose a lot of that openness as they age ... and most windsurfers have had a long time to age

. As much as I like long distance windsurfing, I'll take a day of playing with a wing toy in nice swell over that any day.