I purchased the traffic & weather apps when I had my '14 GSA with the Nav V and the apps worked fine. They still do on my '18 GSA with the Nav Vi. I can listen to my music (iPhone Xs via the Nav VI) and check the apps with no issues.I've often been frustrated entering locations directly in to the unit. Otherwise useful as a visual when I am listening to Waze.
Are the live weather and traffic from the iPhone app free? You need to pay to get it on the unit itself. If that's free when using the iPhone app, thats awesome.
Secondly, presently BMW communications, my iPhone are communicating to enable listening to music from my iPhone controlled by the wonder wheel. If I communicate from iPhone to Garmin to obtain their weather/traffic, does that prevent the TFT iPhone communications for music?