[Symmetry]

SAE level 2 is just a bad idea. People can't be expected to carefully monitor a car and take over at a moment's notice when it's doing all the driving. My adaptive cruise control is great and I hope to have a future car where I can zone out while it drives and take over after after a few seconds heads up, but the zone between shouldn't be a valid feature.

[JumpCrisscross]

I think you mean SAE Level 3. SAE Level 2 is “lane centering” and “adaptive cruise control” [1]. (Level 3 is “when the feature requests, you must drive.)

[1] https://www.ncdd.com/images/blog/diagram.png

[Symmetry]

I meant to include both SAE 2 and 3. I think having both lane keeping and cruise control on at the same time will tend to cause people to lose focus in a way they wouldn't if they had to do one or the other.

[dualvariable]

I don't even use cruise control. I like to be actively switched on all the time constantly making little decisions, including speed, so that I actually am instantly ready if I need to make some big decision.

People these days letting the car drive, thinking they can spring into action I think are underestimating just how cold their cache lines are getting and the major page fault they're going to take when they try to take over.

And I've seen comments by people that they were letting the car drive itself into a bad situation they could see developing, but didn't jump in to take over right away in anticipation (effectively betting on the car over their own skill but still realizing they had to jump in if the car got it wrong--which is just so incredibly confused).