I believe they looked at them. The issue is essentially the expansion board that handles the processing of the 2.5Gbit/S and the port combined were larger than the space they had designated.
There may be patent considerations, and at any rate those things look a lot more prone to breaking if someone trips over the cord.
Ran them on fleet laptops. They broke. All. the. time.
One of my colleagues broke one when he fumbled an extra large gum ball.