It's the pestering when I'm in the call, on a call, parked, but need to unbuckle to reach things. Or moving the car a few feet in the driveway to allow another car out. And having a backpack in the front seat or other items that is not a person but triggers sensors.

I've been putting seatbelts on all my life; second nature. I don't need an annoying ping (and I scan my dash so I see the reminder.)