[Julianpms]

With respect, I think you're missing the point. Some people simply don't have any reason to do regular long trips by car. That's my father's case, for example: he is retired and uses his (petrol-engined) car for short trips locally, but probably only does a trip of more than 10 miles two or three times a year. He has a trickle charger to keep his car's battery topped up, but a diesel with DPF wouldn't work for him.
I write as a very satisfied D4 owner, having come from another DPF-equipped diesel before. My use is quite the opposite of my father's: long trips nearly every weekend, but no short trips or town use at all, as I work from home and use public transport, cycle or walk in my home city. Horses for courses!