It seems to me that the DPF problem is talked about a very great deal, but we hear of very few actual cases where it becomes a real issue.
When I had the XF3.0D S I was pretty paranoid about it, but even though my daily commute was a stop start 7 miles, and long runs came only every couple of months or so, I never had any actual problem.
I did love the car, but sold it when I retired because I was going to be doing even less miles, and was worried about the DPF.
So I am just like so many others who view the issue with great concern, but I suspect that we are all much more concerned than we need to be.
I don't regret it though: I bought an XK150 instead, and it is totally impossible for me to regret doing that!