I think your brain just turns off since it doesn't have to manage the task anymore. I mean keeping your brain engaged, for example when your spouse or someone

I think your brain just turns off since it doesn't have to manage the task anymore. I mean keeping your brain engaged, for example when your spouse or someone says don't be a backseat driver is stressful and you really have no control over it. So I imagine if autopilot is good enough I would definitely relax. The issue with that is you have to be quick enough intervene if the car goes off the rails.