>Also, it's pretty uncommon for me to drive solo anymore so it's far less of an issue.
There's almost nothing a person in another seat can do if you are asleep, even if they realize that in time (and that's a huge assumption). Speaking as someone who has unhealthy interest at failures, disasters, and their root causes, this type of attitude is super common, and always leads to disasters. Please seek medical attention before you killed somebody and yourself. You can't rely on self-control.