I find the Map data to be terrible on my Tesla model Y: speed limits are too often wrong, I have to pay to have very poor traffic data, roads are not up-to-date, road works are not indicated etc. I end up using my smartphone, with Waze as the navigation system. There is absolutely no advantage with Tesla's navigation system, apart from integrating supercharging points seamlessly whilst going from point A to point B.
A true weak point in Tesla's design concept.