IMHO, we just don't understand the structural properties of composites well enough to try to use them in aircraft of this size and weight.
I also don't believe we understand how these materials degrade as they age, since they are so new.
I wouldn't want to fly on this aircraft, with wiring problems, fly by wire, and composite construction.
Hear, hear. Witness the Airbus that lost its vertical stab during takeoff and crashed around New York a few years ago.
I can still remember the response to a suggestion we incorporate "plastics" into high end Hard Disk Drives in the 70's...
"Plastics are not a sufficiently understood engineering material"....
Semper Fi
The 777 has a lot of composites and has been flying for about 10 years. Seems to be a solid aircraft. I saw the video of Boeing testing the wing. They bent that sucker about 30 feet at the end before it popped.
Then you won't be flying much. All newly designed aircraft (A320/330/340/380 and the 777/787) are fly-by-wire and composites are already in wide use on many aircraft. The Boeing 787 will be nearly all composites.