Mish is right. I feel thee is another issue at play and that is the plethora of museum standard models all over the place. Anybody new will have a look at that and think there is no way I can produce that! Not that we should stop publishing our work. But to some this is going to feel daunting.
On the other place I was involved in a couple of GB's (thanks for organising mish) with that in mind one was the less than a tenner gb and the other was out of the box gb. On the less than a tenner someone decided not to build the same kit that I had started because I had done a good job of the Cockpit. So his sense of competitiveness and need for instant gratification put him off.
I run the weekend in a weekend for fun and just that. It causes gnashing of teeth swearing and in my case a bruised toe. But if people can see that you can produce something acceptable in a weekend there is hope yet.
Is the hobby dying? No has the target audience changed? But look at some of the wooden ships on here. Who would have saidin the fifties that these would dissappear? Me for one. But that hobby appears to be in rude health