"Both lead to immediate adjustments in driving, more quickly than any human can react. "

Again, sort of. ABS isn’t quicker than humans react, it’s a stopgap measure for divers without sufficient skill. It only turns on after you have fucked up and locked your breaks.

“I don’t know what it is, but they generally execute smooth comfortable turns.”

Likely a combination of software that defines comfortable zones, including adhering to speed limits and paired with an accelerometer.

I think we are still a very long way off from autodrive. Being able to handle changing conditions like freezing rain and black ice or a flooded road will take time.