2021.12.25 Official Tesla Release Notes - Software Updates
Tesla software update 2021.12.25 includes Sky Force Reloaded, New Language Support, Tesla Powerwall Coordination, Tesla Toybox, Cabin Camera, Cabin Camera Updates, Range Display.
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Most notably
Range Display
Your vehicle's range estimation has been modified to better represent real-world conditions.
and
Cabin Camera Updates
The cabin camera above your rearview mirror can now detect and alert driver inattentiveness while Autopilot is engaged. Camera data does not leave the car itself, which means the system cannot save or transmit information unless data shared is enabled. To change your data settings, tap Controls > Safety & Security > Data Sharing on your car's touchscreen