Fred, I do use Waze a portion of the time, but (and I can only speak as I find), I've never had an issue with the built in Navigation and traffic overlays.
In fact some months ago, even though the motorway signs never displayed any warnings, it told me to come off at the next exit due to an obstruction ahead. as far as I could see the traffic was still flowing and I umm and arrg about following the advice, but did, and when I came off, the road followed the motorway parallel and after only 1/4 mile everything came to a standstill. Then on the radio 5 minutes later, it said to avoid that part of the motorway due to an overturned lorry, causing many miles of tailbacks and at least an hours wait.
would Waze or Apple maps etc. done the same, of course they would, but the point is the VW system gave me more than enough warning to avoid the situation. This has happened several times. Like I say, I'm not knocking Waze or Apple maps etc because they are pretty much state of the art, but the issue is, I wasn't using navigation at the time, and the car still warned me.