I wonder if the feature is more like "Skip software update confirmations and immediately update my car as soon as it's flagged, parked, and plugged in" rather than "Skip the rollout procedure and flag my car for updates as soon as possible."
No way it would be the former of the two options you listed. I don't want the car deciding when to install the updates. Sometimes these updates can take 30+ minutes to install. What if I need to go somewhere and the car is unexpectedly updating and is not drive-able for 20-30 minutes? A situation like that just isn't acceptable.
It's definitely an option to put your car into the "fast track" release cycle for the most current publicly available update for your car configuration in your particular region.