If/when QPS is realized, calibration to a fixed point via manual verification, fixed base station(s), and/or multiple GNSS systems then GNSS spoofing, accuracy, and precision won't matter all that much because it will be entirely self-contained.

It's absurd overkill to put GNSS transmitters, RFID tags, and/or Bluetooth beacons on every object because the world is being flooded, for better or worse, with AI visual and IR cameras.

> Prevision GPS is useful for a lot of things, but it isn't needed for car navigation. If you know within 100 meters of where you are you can figure out the exact lane you are in by other clues - clues that you need to look for anyway because road/utility crews will sometimes direct you to do things that are not on your updated maps.

Except it is because driving direction routing depends on determination is based upon knowing which of several parallel, different roads one is on like the difference between being on a highway and on a parallel frontage road. Incorrect road detection leads to offering wrong directions.