The issue of cam wear was spotted in Europe pretty early on after the introduction of the pd engine in higher spec VW models, Seat and Skoda stuck with the older TDi engines.
Several oil companies therefore brought out oils specifically for PD engines, in the same way as they also had Zetec oils for Fords. Castrol even had a Magnatec marked up for Vauxhall.
With the correct oil the Private Hire and Taxi trade regularly put 300k or 400k on Ford/VW or Seat 7seaters with few if any issues.
Most issues were I suspect from low mileage private owners who skimped on maintenance.
I have watched people at Halfords buy the cheapest oil they can see on the shelf, usually GTX and then you see them outside topping off a vehicle that is fairly new so extremely unlikely to be specced for that oil.
The problem is when these vehicles have issues later in their life Internet forums end up full of comments about their PD engine needing a top end rebuild.
As an example a large Private Hire Co in London called Addison Lee has a fleet of about 4000 seven seated vehicles, they use the Ford Galaxy now but used to use the VW Sharan with the 115pd engine.
After a three yr life they often get sold onto owner driver Private Hire drivers, they have at least 100k on them at three years.
You can easily spot them due to the fact they are all black and have a slightly unusual spec (seat colour and inbuilt child seats for example)
There are still many running about on 2006 and 2007 plates.
A mates brother works for the fleet department there and he said the only problems they had were with the autobox, the engines were reliable, they did use the correct oil though and changed the oil at 5k.
Over the years they used them they likely went through 20000 of these vehicles.
He also says the Galaxy with the 2.0 diesel is just as reliable, though the later ones with the Powershift box suffer from slight juddering on pulling away sometimes.
06 Clio1.5DCi,124k 6kOCI Shell Extra 5w40
08 Pathfinder 2.5 Dci 122k 5kOCI Castrol Edge FST 5w30
12 Jaguar XJL 3.0 D Luxury 108k 8kOCI Mob 1 ESP 5w30