There is more to it than just all Carbon. Design plays a major roll as dose core material, lay up and curing technique. There are many Carbon A's on the market. The DNA is a different line of thinking re hull design, pre preg carbon nomex. The beams are also incorporated into the hulls, not just glued in.

I am sure you could order an X16F without the beams glued if desired (maybe extra $$$)

Development classes evolve. Even if current boats are all carbon they will be superseded by a faster design at some stage. If that bothers you, then don't play.