Rarely use the P6 handbrake with it being auto - never thought about it.
Thought about my first P4 though with the “fly off” version when I pulled up to a post box on a hill and jumped out to post a letter with the hand brake on, only to find it was creeping its way back down the hill.
Managed to jump in vintage Le Mans style and save the day!
Live and learn.
You know it makes sense! 
