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Sandman1221 said..
So ZFINS and AFS are very similar ...

only apparent similarity to me is that they're both made of carbon... but even that doesn't say much.
back on topic: the evolution towards more slalom/speed oriented foils risks us falling into old traps: with two front wings you can cover pretty much any feasible foil course racing conditions, but you need at least three wings to cover the slalom range. ditto with sails: you need at least three (more likely four) sails to cover the slalom range while two course racing sails do the trick.
don't get me wrong, I like speed around the course as much as the next guy, whether it be up/down, figure-8 or downwind slalom, but there's a cost.
and ofc I'm aware of iQ foil, which has a lot going for it, but OD racing is not my thing (yet...)