I don't own any P-cars but I've had a 2007 GT3 RS parked in my garage for the last several years and a 2017 GT3 RS added to it last summer. (My friend has too many cars and needs a place to park his cars)
The keys are stored at my house, so I've had access to drive these cars daily if i wanted but I choose not to because:
1. They receive too much attention
2. They aren't that practical to drive around for daily driving to do errands
These are solely cars that you get in and drive around just for the sake of driving around. With family duties and other priorities in life, I just don't have the time to drive around for fun anymore.
They are sick cars, but I can't enjoy them to their full potential.
I'm just about to pick up my M2 and I'm stoked to be able to pick that up and drive it around as a daily driver. I'll be able to do everything I want with it.
Sidenote: I went to a wedding last weekend and I was going to pose it up by showing up in one of the RS, but my wife wouldn't have been able to get in the car without falling over in her dress.
We ended up taking the SUV. lol