Burger here. Statistically, 96% or more of our vehicles are automatics. For the most part, people just throw the shifter into Park and turn the car off unless they're on a hill, in which case they may or may not set the cable brake as well. This is generally quite reliable; I've never heard of a transmission parking pawl failing or requiring adjustment. I would imagine that manual transmission owners would use their brakes much more regularly than automatic drivers, but there are so few manual transmissions where I am (<0.5%, probably) that I don't actually know for certain what the common practice is.
I have a couple of 1960s Chevrolet service manuals where it is interestingly referred to as the parking brake. I would imagine that as automatic transmissions became the majority the name changed to reduce confusion with the transmission's parking pawl. I personally drive nothing but automatics, call it the parking brake except when doing so causes confusion, and use it almost every time I turn the car off.