All the 777 F/O's are there by choice, they could have held MD88 Capt. years ago. Many are displaced 767ER Capts. now.

I know many of the 777 F/O's I've spoken with on trips are bypassing the Capt. seat of anything smaller than the 767ER. Many of them have already "Been there, done that, not going back to narrowbody Capt. any time soon!" I did the same thing in the right seat of the MD11, waited until I could hold reserve with move ups before I bid the 767 left seat. Having already been in the left seat of the MD88, I was still a recovering dial a flap aholic and didn't want to go back to that hell hole.

A few of the junior ones have bid off to fly the A320 and 737 Capt. seat, but I doubt you'll see any who want to fly the 717.