I think we (or, at least I) might be confusing two different issues here.
One is Auto Volume Control which increases or decreases the sound of the audio system based (supposedly) on ambient noise but I think most are based on vehicle speed. I've had this in at least two vehicles and always disabled it as it turned the volume too high or too low for my liking. If I recall correctly, VW group called theirs GALA, graduated audio leveling something. Tesla's do not have this, I think they're focusing on dual pane/acoustic glass and other sound deadening tactics to make the vehicle more quiet which may make this feature not needed.
The other is Automatic Noise Cancelling, which Model S/X have where the vehicle identifies unwanted sound (Road noise, wind noise, etc) and emits the anti-sound equivalent thru the speakers resulting in a more quiet experience and minimizes the need to adjust the audio system's volume. This is not common in all vehicles, although I think more than a few other vehicle manufacturers offer it.