Tesla's Full Self-Driving (FSD) beta allows you to select one of three driving "profiles" that determine how the car reacts to certain road circumstances. The aggression of each mode, "Chill," "Average," and "Assertive," varies (and potentially safety). The function was included in the October 2021 version 10.3 update, but it was withdrawn two days after it was released owing to a problem with left turns at traffic signals. One day later, Tesla released version 10.3.1, which still contains FSD profiles, according to the release notes on Not a Tesla App.
FSD profiles, according to these notes, are used to "regulate behaviors such as rolling stops, speed-based lane changes, following distance, and yellow light headway." A different graphic shared on Twitter provides a more in-depth look at what this signifies. Tesla says the car will "have a reduced follow distance" and "conduct more frequent speed lane changes" if you choose the "Assertive" option. The vehicle will also "not exit passing lanes" and "may make rolling stops," however it's unclear if this implies cars will not come to a complete stop at stop signs. A YouTube video demonstrates all three modes in action, as well as how Tesla defines each FSD profile near the conclusion.
The car will "have a bigger follow distance and do fewer speed lane changes" in "Chill" mode, while it will "have a medium follow distance and may make rolling stops" in "Average" mode. However, because this video does not evaluate the vehicle's performance in heavy traffic or in adverse weather conditions, it's difficult to see the difference between these modes. It's difficult to say how much these FSD profiles alter the way the car drives and whether they push the boundaries of safety, particularly while driving in the rain or snow.
If the descriptions of these characteristics are correct, a Tesla in "Assertive" mode may follow automobiles closer, come to a rolling stop, and switch lanes more frequently - all of which are more risky regardless of the car. It's worth noting that Tesla's FSD function doesn't make the car totally self-driving; a "feature complete" version would ideally allow people to drive themselves to and from work. Last September, Tesla's contentious FSD beta was expanded to more customers, based on a "Safety Score" system that rewards drivers with better driving practices, something the National Transportation Safety Board warned against. In November, a Tesla was substantially damaged in what looks to be the first-ever collision employing Tesla's FSD mode.