I'm not sure what your question is asking...but what I mean is that Google Maps are ostensibly improved by analyzing how users use the app and how they seem to utilize the information...I imagine just as Google search tracks which search results you click -- and also, if you hit the Back button, and how long it took you to do that -- in order to evaluate SERP effectiveness, there must be some kind of feedback for Google Maps...? The live traffic projections, AFAIK, are a result of collecting GPS information from Android phones on the road.

Apple has been claiming that it wants to build apps that don't draw on user information, as to prioritize user privacy. Maybe they'll apply that attitude towards their Maps app.

Slowly, gradually, they will start doing that. The trade off for them is too much. Previously they claimed they don't read your personal emails like Google does. They soon realized they were losing big customer base because of people preferring Google Now over the pretty useless Siri. Now they have announced Siri Proactive, but for offering those features it has to read your personal emails. Now they claim they do read emails, but everything will stay on their phone. On the whole, users want intelligent features, and if Apple doesn't give it to them, they're going to go away.

Then you won't have things like live traffic, it is a tradeoff

Why? User data is only one way to measure traffic. There are others.