My Tesla has full functionality whether I subscribe to anything or not. Subscribing gets me cell service so it can update as we go, and is similar in price to cell service for other gadgets

With cell service

• maps have live traffic
• I can listen to streaming music

Without cell service

• maps can’t update live traffic data
• I can listen to streaming music on my driveway, but otherwise use Bluetooth to stream from my phone

Ok, fine, full self driving is now a subscription