See this is what I don't get. This system is supposed to reduce cognitive load. But then in this case it actively tried to kill this guy. So if there are so many caveats and rules, and they change with every update, and then if you miss or misinterpret one, the consequence is that it tries to kill you, how is that going to make the driving task easier?
I read this thread and immediately called my in-laws (late 60s) and told them never to use NoA or any auto lane changing on their Model X. Guaranteed they did not read the manual for their car. There's also a sales guy at my office who got a Model S and goes around telling people "I can take client calls while it just drives itself, it's amazing!" Guaranteed he didn't read the manual, either. This is a real problem. The general public don't read the instructions.
Indeed there's a South Park for that:
HumancentiPad - Wikipedia