Interesting, even though just about every diesel mechanic I've spoken to, read an article from, or have been interviewed, has said that can-cans are a critical piece of gear for all modern diesels fitted with the current pollution controls.
I honestly believe that governments and 4wd manufactures don't care about the longevity or reliability of current diesel vehicles. They just care about ensuring their vehicles meet the ever-changing emissions requirements to be able to continue selling vehicles.

The only way this will end or improve is if falling sales impact the economy.