Every single one of my van driver friends have stretched themselves financially to replace D.I.Y fixable euro 4/5 vans for complex expensive euro 6s , none of them could afford a new one with warranty. All of them are now looking at the delete..
I guess they're intended to be run by companies from new for 3 years (under warranty), and then moved on as depreciated assets. It's a big problem thiough for small companies and private individuals who can't afford to do this and end up running older vehicles. Virtually all our friends (dog trainers/competitors) run vans, and even EU 4 ones (particularly those with DPFs) are bad enough. I'd happily have a petrol van - we only do about 10k miles a year in our Vito and I'd definitely take higher fuel costs in return for better reliability, particularly as it got older. VW did actually re-introduce a 2.0 petrol Transporter a couple of years back but it didn't last long.