You make good points. Although, disengaging when you release the wheel sounds like it could do as much harm as good. If anything, I'd rather it discourage this

You make good points. Although, disengaging when you release the wheel sounds like it could do as much harm as good. If anything, I'd rather it discourage this behavior using a nag alarm, possibly followed by automatically slowing/stopping the vehicle somewhat safely. As you say, people are stupid, and I can see some idiot trying to grab a beer out of a cooler in the back seat within the grace period (or deal with a dropped cell phone, pebble in a shoe, spider on the window, etc) and ending up careening off the road or into oncoming traffic. I agree that this feature isn't useless. I'd love to have it, myself. As you say, it does need work to idiot-proof it, and possibly a re-branding. But still, I would much much rather see full autonomy, as soon as possible. Wouldn't want to see us stay bogged down in the halfway stage. And I'm a little concerned that the first fatal accident caused by inappropriate use of driver assistance systems like this will unrightfully poison minds against fully autonomous systems, and take us a huge step back.