It sounds like "cost" is the answer. 20 year newer technology could hopefully overcome any issues the older GM products had. Also, trucks are so damn expensive these days, what's another five grand?
Looks like this is a prototype and hasn't made it to production. All I can find are articles hinting it may come out, but they're at least a year old.
My solution is to hopefully get a shorter truck. A crew cab 6' box is the same length as my extended cab 8' box, and it seems like the majority of trucks these days are crew cabs, most with 5' boxes, a few with 6' boxes. I'm hoping to find a extended cab with a 6 or 6.5 foot box.
I can also see idiots modding their trucks to crab down the highway, if it looks stupid it must be cool, right?