I can't speak for anybody but myself Don. 
In my case I own a business and NEED my truck to run every single time I turn the key. I don't have time to deal with service departments for warrantee repair. The down time can kill a small business. 
Case in point: A very good friend owns a small business and had a Ford 6.0. The thing was always in the shop for something. Even though his truck was under warrantee it was killing his business. 
Another case is a friend with horses. She runs around the state doing rodeo stuff. I think you can see this would not be a good time for a part or engine to fail. You just can't have horses in a trailer along side of the road in July.
Another case is keeping your truck for a long time. I know I'm odd man out on this deal but I keep my trucks a long time. I just don't make the money to buy a 50, 60, 70 thousand dollar truck every 3 to 5 years or so like a lot of you do on this forum. I don't need my truck to make it just past warrantee period. I need to have that truck last 20 years past the warrantee period without a major failure. A 10, 15 20 thousand dollar repair bill is just out of the question. 
Then there is the parts availability and safety issue. I have a BMW that has a recall on the airbags. I went to take it in after they issued the recall and they said there were no airbags to be had. Well my daughter is driving this car and the recall still isn't done on it. Some of these trucks on the market take months to get the parts in. How is that going to work with a small business that may only have 1 or 2 trucks in it's fleet?
Anyway, that's why "I" get pissed off. :B