The other thing I find interesting is that Bosch claims the CP4 pump is "improved" but I have yet to see any information on the details of the improvements.
For me there is way too much of a lack of transparency on the issue for me to even remotely consider a CP4 equipped truck. People with deep pockets that trade their trucks off every few years are in a different scenario than I am. I'm at a point in my life where preparing to put my son through post secondary education and setting myself up for retirement is much more important than spending an obscene amount of money on a new truck every few years.
There have been several news stories in my area over the last couple of years of VW diesel owners who had the CP4 pump grenade on them and received no warranty coverage from VW. Interestingly enough, when the media reported on them, all of a sudden VW changed their mind and covered them, at least partially.
Also, getting a bad tank of fuel can happen to anyone; as much as I haven't seen any water in the separators in any of my trucks, I have been able to recognize a few bad tanks over the years because the power of the truck was way down and the fuel economy was as well. The filtration system on the vehicle needs to be able to deal with this at least to a reasonable level.
The problem is real; some people just choose to ignore it. I truly believe it is not a matter of if but when it happens to all CP4 pumps.