I may be wrong, but from few other enthusiast niches I conclude, enthusiasts number is very little to feed hardware development. - Need millions sells, but real

I may be wrong, but from few other enthusiast niches I conclude, enthusiasts number is very little to feed hardware development. - Need millions sells, but really most real project have made thousands sells. And this is long known - even Raspberry born for other market, fortunately, was not just killed but conversed to target enthusiast and even now incomplete project.