If OP had not been using a Comma, they still might have fallen asleep at the wheel that night. With the Comma, a crisis was averted. Without the Comma, they would almost certainly have wrecked.
If you fall asleep at night, your car shouldn't just happily drive around with some alpha software and hope for the best. Instead, the car should WAKE YOU THE FUCK UP when it detects you're becoming fatigued/drowsy and tell you to get some sleep. Driver fatigue/drowsiness detection is nothing new and implemented in lots and lots of cars. Get one of those instead of resorting to some dubious software which is most probably illegal to use in most countries.
> I might or might not have fallen asleep one night on a long road trip and awoken to my car driving along happily
My nightmare is getting smashed to pieces by people like you and your insurance refusing to pay because you found it funny to fiddle with your car. You being bankrupt will not help me.