Risk vs reward. You reduce your risk further, by going with wheelchocks AND the parking brake.
Old School but it's the most practical if there are curbs. Anyone growing up in SF in the 60's and 70's would have this in their repertoire.
As @ucmndd stated, the brakes holding are not sufficient protection if you are parked on top of snow or ice type of conditions. In that situation it has nothing to do with the brakes not holding but the tires not having sufficient traction, tires break static friction adhesion to the surface, and the car slides down the incline. There was a case I recall a couple years ago where that happened to someone, they tried to argue the brakes didn't work, but I recall video seeming to show rear wheels still being locked up. This is the scenario where some chocks could help, but they also would ideally want to clear the surface below the chocks and tires first if you had the ability to do this.
Just make sure they don't see you sliding bricks under wheels of your fancy car
It’s the electric parking brake in either case. I had speculated at some point in the past that the long press was like an “extra” hold with more pressure on the caliper/rotor, but others said that wasn’t the case and it’s all the same thing.
But the brake is plenty powerful enough to lock the wheels and hold the car even on a very steep slope.
There is a visible difference in the instrument cluster between simply tapping the park button after a drive and holding it down for a second or two. In the latter case, the parking brake symbol illuminates in red. No visual indication at all in the former.
