Earlier quoted context omitted.
Note that the Tesla changed lanes, into the passing lane no less, and then immediately slowed down significantly. So the first car to hit it may have had a very safe distance between it in the next car, but the Tesla cut that significantly with its sudden maneuver.
It's a popular opinion but I think it's wrong. If they weren't all so close together some of that could habe been avoided. The Tesla indicated for a very long time telling other what it's gonna do.
3 seconds is a very long time? Also: 3 seconds of turn signal is a clear indication of "i am going to change lanes and fully come to a stop"? And then turning off all signals and coming to a full stop without hazards on is a clear indication of "i am stopping"?