License Plates, Vin Numbers clearly available on the dash, Tire Sensors, Bluetooth MAC, WIFI MAC, Cellular IDs for most even if you don't pay for the service.
It's an interesting thing to point out, but we're mostly driving around with much higher power sensors than the pressure sensors.
For decades we had battery packs that could be replaced. we have lifepo4 that's super safe to handle, i don't know why we don't have replacable battery packs anymore :/
You're not wrong, but they sure didn't make it easy.