There is no conceivable advantage to one except to pander to green luvvies. You would have to have a completely new ECU system that would know when to regenerate the filter as well as the added complication of increased back pressure on the exhaust flow. The list goes on.
Go and have beer instead and put the thought down to temporary insanity.
With all the problems they seem to create I'd keep away from them if I were you. My next car will be a petrol anyway so I'm not ever going to think about those pesky DPFs again. (Not that I ever had one to worry about but I have read several horror stories on here about them) Ok I guess if you do regular long distances.