I think the key is the amount of stress induced while driving. If you're driving an appliance like a Tesla or Camry you're getting next to zero stimulation. If

I think the key is the amount of stress induced while driving. If you're driving an appliance like a Tesla or Camry you're getting next to zero stimulation. If you're driving,say, a clapped out, no powersteering, manual trans G-body, the level of stress and multitasking is an order of magnitude greater. Though in that case let's level of stress might be more if a detriment than a benefit.