That last but is almost NMEA 2000, which standardizes exactly that kind of information, but in boats. It’s old enough that they based it on CANbus, but there are many repeater products to add IP devices (Ethernet, Wi-Fi, Bluetooth) to the network.

ETA: By which I mean to say, plenty of designs already exist in the marine market which could be used to bridge a car’s CANbus to consumer devices, if they wanted to.

True story. I remember back in the bad old days when Firefox had notorious memory leaks, so when building my latest PC, I put in 32GB. The monitor app on my desktop has only ever topped out at showing 30% of memory allocated.

And, eliminate Euclidean zoning in the U.S., so that people can live near where they work, or work near where they live. (Not all of us can do it, or like working from home.)