Connectivity would be for streaming internet radio and the web browser. Maps and navigation don't need data except the update the maps and, since they included in the base, I assume map updates would be free. It would make sense anyway so you can still use them to find and get to a SC.
Well it would have to be a really cheap data plan for me to pay for that. I don't care about using the web browser on my car and I already stream Spotify from my phone for free. The minor added convenience of having a button for it isn't worth much to me.