> limit or disable certain functionality in the vehicle (e.g., navigation, lane keeping assistance (…)

Curious why lane keeping assistance would need to communicate externally. Isn’t all this processed in the vehicle?

You're reading too much into the editorialized title, this is a FAQ for Can I disable all data collection from my vehicle?

Lane keeping assist likely (a) shares data back to Rivian, and (b) depends on GPS and (live) map data to know location specific settings.. that there are 4 lanes on this road and the left 2 lead somewhere else (etc). Line detection (on-device) isn't always reliable (snow, rain, ice, mud, gravel, construction)