Wood is cheaper NOW. Again, when the economies of scale and mass production composites make sense...
Composites don't require any "working" just pop them out of the mold!!! Oversimplified, of course but I guarantee there won't be any hand "shaping" steps going on to a molded neck.
I'm sure they'll sound fine, especially to those who think the material has no effect on the sound, LOL!
More control over the result?... absolutely not. Wood is tempermental and as inconsistent as all heck. Composites are much, much more predictable and stable. Lifetime guarantee against warping, anyone?
As I said, I appreciate and respect your perspective as a small boutique guitar builder. But we've all seen this happen in the big world OUTSIDE... composite tennis rackets, composite race cars, composite house construction materials... it WILL happen for mass produced musical instruments, it just hasn't yet.
You're gonna owe me a beer... some day, LOL!!!