I wish there were car reviews out there that take software quality in account in particular for things like lane keep assist. When I was in the market for a car the reviews that I have seen only mention if they have the feature, not how well it actually works.
For what it's worth, there's a specific distinction for software systems like lane assist. The bar for "working" is so high that if it doesn't essentially work perfectly we can't say it works at all.
We would expect reviews to point out if a feature such as lane assist fails or has noteworthy failures (such as rapid weaving inside the lane) but maybe not so much if it works properly.
I currently have a Honda Civic with lane keep assist. It doesn't slow down before curves and disengages frequently. Tesla's autopilot works much better from what I have seen.
I have a 2016 Volkswagen (Tiguan II), whose Lane Assist also leaves a lot to be desired. It handles nearly straight roads with no traffic quite ok, but it would surely crash the car on nearly every obstacle (lane narrowing/widening, obstacles, tighter corners, ...) without manual intervention.
That's a reason why I don't believe in seeing safe autonomous cars during the next few years at all. But maybe Tesla is that much better - haven't ridden one.
