It is like what manufactured trusses did for stick framing. It lowers the skill level of the person on the ground building the house. It is hard to find a young carpenter who can frame a compound stick built roof.

Now with the advent and popularity of the CNC timber frame shops the people on the ground are not as skilled as they once were. If an on site problem arises then who has the skills to correct it. I know the argument will be that "Well my guys can fix it" will be the current response from a CNC shop, but twenty years from now once the current crop of carpenters retires what will they say?

Kevin