Well, the fact is of course that full on slalom boards now are quite popular with the general, better than average skills, crowd (at least here in Finland). The challenge of riding a full on slalom board as compared to a freeride makes the blasting part of the sport interesting again.
And this largish group of people certainly appreciate well made boards that last for some years, and don't have to be repaired repeatedly. It is of course nice to ride the same boards that top racers are using in worldcup events, but not at the cost of a "total eggshell experience".
Making the slalom boards disposable after use sounds a lot like the sinker trend that killed windsurfing in the eightees.