> Subaru’s problem is that no such standardized system yet exists, forcing it (and eventually other brands) to have to nix its Starlink telematics offerings and related data harvesting.
It does exist, it's called J1939 and it is popular already in trucks and non european truck-like consumer vehicles i.e. pickups.
It also allows the effortless integration of aftermarket systems like F+R sonar emergency braking, trailer ABS units, radar cruise, low speed acoustic devices and various other bolt-ons like power take-offs.
In fact, it's this standardization that allowed some hundreds of third party fleet telematics systems to plug into virtually any OE vehicle and pull out a whole bunch of useful data, such as the odometer, fuel level, road speed, torque request and selected gear.
It does however currently lack useful standardization for electric vehicles. They can fit within the standard, but there is no standard way to read the voltage of a particular cell in one of the vehicles' many battery packs, for example. Or the state of charge or battery wear as a whole. I think this contributes to the high integration effort in EVs at the moment. Or why you see few upfitters doing custom bodies for EVs. Things could be a lot more .. plug and play.