I think you are seeing several trends:
1. All major auto manufactures are starting to deny warranty coverage where they think there is a possibility it was caused by abuse or misuse
2. The HPCR engines are more technologically advanced, which makes it easier to cause harm when changing them
3. The use of performance enhancing products has increased dramatically and become far more accepted
4. People are using products that have not been fully tested for a extensive period of time to rule out possible failures
5. People are using performance enhancing products in ways the manufacturer of the performance enhancing product did not intend, or warns about possible failure
The combination is that there are an awful lot of bombed trucks going boom. The non-bombed trucks look suspicious. We all used to regard intake and exhaust mods as harmless, but not in the eyes od DC. Just a change in tire size is seen as performance mod.
I question how mocuh modding there will be on 07 and up engines. As they get even more technical, and the market for aftermarket performance enhancers dries up as people loose warranty coverage, I think stock diesel will be what we drive.