The real question, as I found yesterday, is can you switch on high-speed wipers, rear fog lights, hazard lights, and max-demist, in a few seconds, while you're

The real question, as I found yesterday, is can you switch on high-speed wipers, rear fog lights, hazard lights, and max-demist, in a few seconds, while you're devoting 99% of your brainpower to not crashing into an unseen vehicle slowing in front, not veering out of the lane that you can't really see, and glancing repeatedly in the mirror in case you're about to be rear-ended. The question is not whether you can operate the controls under normal circumstances. It's whether you can do it when task-saturated with more important tasks. Under such circumstances, I simply wouldn't have had any attention left for glancing at a touchscreen, but I did know and could hit all the manual controls rapidly without looking.