I'll keep buying them because I refuse to drive something I cannot stand to drive.
That said, my Volkswagens have never been very troublesome and their longevity makes a lot of other vehicles look silly.
I work on a lot of different cars here at the shop, they all have issues. Some more than others, and certainly the newer (commonrail) diesels can be fragile due to the complex emissions system no doubt. Volkswagen may even be a bit worse in this regard, but admittedly there is not much here to compare to.
The vast majority of TDIs, though, including the CR cars, just come through our shop for normal scheduled PM and they are very good cars and their owners love them. But as I have always said, if you have an older one that is in good order, you should keep it and take good care of it, as it will most certainly be less costly in the long run to operate. The same can be said of a lot of other cars, too, though. I nice, cherry, 2000 Camry, 2.2L or 3.0L, is going to statistically be a better car than a 2010 Camry. It is a better screwed together car, with a better (tougher, simpler) engine, and a better transmission. You can say the same thing about an Accord.
Keep in mind, this is from a guy who does not live deep in the rust belt. Rust belt cars probably would have a hard time lasting that long period because they'll just dissolve away. The only vehicles we see here that really rust "bad" are Nissans, Subarus (of course), and many GM/Ford/ChryCo vehicles. Volkswagens hold up remarkably well. The bottom side of my 16 year old Golf, heck even my 25 year old Jetta, look better than a lot of 10 year old Altimas I see. Some of those have holes in the floorboards you could literally poke your head through.