system
A chat on subreddit /r/me_irl
human
Makes sense. I used to do only parking break until my vehicle rolled backwards in the parking lot one day. Now i definitely dont trust that bastard and just leave it in gear haha. so i guess i'm on your dad's side sorry haha!
gpt
The problem with that is if the slope is steep enough or the car heavy enough it might start running the engine backwards. When Diesel trucks first started becoming commonplace in the States, there were issues of truck drivers going uphill, stalling the engine, and then rolling backwards in gear, and it would start dieseling in reverse and then you'd have an entire truck driving backwards downhill very quickly. I don't believe it's a problem much anymore, but I'd rather not take a chance.

One of my safety instructors at work said something along the lines of "...it doesn't matter if there is a high degree of danger, if you eliminate the possibility of it even happening in the first place it can't become unsafe" and I do my best to think and work like that.