Not a stupid question at all! Yes, you can stay hands/feet off 100% of the time but the cameras track if you take your eyes off the road for too long and will nag you to pay attention (since the law still requires you to "supervise"). This version of FSD I'm running (v14.2.2.5) is a much older build that the newest out there. I have no idea why I haven't received the newest update yet but Tesla tends to send the "latest and greatest" out randomly to test groups before sending it out to wide-release. The newest version doesn't nag you to pay attention to the road at all from what I'm hearing. You won't be able to nap or ride in the back seat while the car drives until the government approves full autonomous driving. That could be within the year here in the US.